In 1957, Gabrielle Chanel introduced the two-tone slingback shoe; 58 years later Karl Lagerfeld brought it back on the catwalk for Autumn '15. Now, you can't flip through a set of street style photos from Fashion Week without seeing it on the heels of fashion insiders and editors everywhere, proving that what's old is new again. In fact, it's this season's hottest shoe. More than 50 years later, we're all wearing (or lusting after) the same pair of shoes that was sought after by the style set in the late 1950s. So, while we're all clamouring for trends, our wallets often tested by fast fashion, there's something to be said for quality craftsmanship and a simple, time-honoured design. Herein, there's plenty of good reasons to fall for the legendary Chanel shoe (£455), from the leg-lengthening design (the two-tone design shortens the foot and elongates the leg line), not the least of which is seeing everyone else showing it off with a fresh 2015 twist. Just scroll through and try not to be tempted — but if you are, you can give in, knowing these never go out of style.

A video posted by CHANEL (@chanelofficial) on Sep 22, 2015 at 8:19am PDT“The medium or Jumbo Flap Chanel bags that were selling back in 2000 are still super hot today. But if I had to nail it down to a style right now, I’d say the medium Chanel Boy Bag is the most popular.” Chanel Small Boy Flap Bag ($5400) “If you want to be sure that your bag will continue to gain value over time, stick with the basics. Go with a classic black Chanel Jumbo Flap made in lambskin or caviar leather. The crazy thing is that Chanel continues to raise the retail price on these styles every year or two. So if you bought your Jumbo Flap in 2006, it cost you $1795. If you buy that same bag in 2015, it will cost you $5500! This means that if you bought your bag back in 2006 and decided to sell it today, you can potentially make up to $3000 more than what you paid for it. Truth be told, if you hold onto any Chanel bag long enough (10+ years), you’re going to have some real value locked into that bag.”

“This is actually one of the things that I adore about Chanel—the really cool, collectable, and super-limited pieces. You actually have to hold onto them longer if you care about resale value, because they’re special and usually have a higher price point out the gate. Some of my favourites are the minaudière clutches, such as the vinyl record minaudière, the cassette tape, and the gold bar. The S/S 04 cassette tape bag retailed for $1600. Fashionphile once received a clear one that’s a tiny see-through clutch. We had never seen one sell before and ended up listing it for $9000. It sold in 30 minutes.” Chanel Minaudière (price upon request) “Sometimes more bells and whistles make a bag harder to resell. All of the beading and tweeding looks amazing (and I love carrying a bag that no one else has), but if you care about resale, all of those extra trappings don’t help. Stick with styles that have the traditional chain strap, visible CCs, and you’re good to go.

The vintage hardware was made with 24K gold alloy—you can tell these bags by the little hallmark embossed in the crossing CCs.” Chanel Classic Flap Bag ($6000) “If you aren’t an expert in Chanel authentication, I’d say the most important thing to look out for is that you’re buying from a reputable seller. There are all kinds of businesses now that mean well but have a ‘no returns’ policy and one single authenticator. ‘No returns’ is a red flag. adidas womens running shoes saleSome of the higher-quality fakes even have registration numbers, holograms, cards, come with receipts, and are made of quality leather and hardware. nike tennis shoes online australiaDon’t be fooled just because a bag has these features. buy nike mens shoes online india

If you need help, use an online authentication service.” Chanel by Francois Baudot ($52) We want to hear from you! Tell us which Chanel bag you have your eye on. Share your purchasing tips in the comments below!Believe it or not, in 2014, there are still fashion brands that don't sell their ready-to-wear -- or, in some cases, accessories -- anywhere online. Aside from cosmetics and fragrances, labels like Chanel, Céline, Hermes and Dior require that you physically go to a store to purchase most if not all of their clothes and handbags, just like you did 30 years ago. nike shoes sale online canadaWhen there's data proving that shoppers are increasingly choosing to spend their money online over brick-and-mortar stores, why eschew that potential opportunity?best running shoes bad knees Chanel has given canned answers to this question a couple of times. running shoes for those with flat feet

“Fashion is about clothing, and clothing you need to see, to feel, to understand,” Bruno Pavlovsky, Chanel’s president of global fashion, told Bloomberg last January, adding that the company's digital initiatives are designed “more to bring the customers to the boutique.” Just last week, Céline CEO Marco Gobbetti told WWD that the company prefers to engage with customers directly “in the way they like to be engaged" -- that is, in the store. And while, sure, exclusivity is a hallmark of each of these brands, there are likely other, more financially strategic reasons for their focus on brick-and-mortar retail. They're not forgoing sales just to play hard to get. In the case of, say, Dior, "you have to look at their business model," says Katalina Sharkey de Solis, managing director at ad agency Moving Image and Content, who was, at one point in her career, a digital director at Chanel. "It's a diffusion business model, so the percentage of revenue that ready-to-wear actually represents is very, very small."

Ready-to-wear, she says, is essentially a tool to market a label's other (often lucratively licensed) goods -- i.e. handbags, sunglasses, makeup, skincare, fragrance, etc., much of which you can buy online from these brands. Of course, that's not to say these brands aren't selling any clothes period -- strategically, they just might be better off selling those clothes in an exclusive retail environment that draws their best shoppers into stores. Were the labels to put those clothes for sale online, brands could be "cannibalizing in-store traffic," says Sharkey de Solis. Of course, there is the argument that brands, in a desire to keep their goods "exclusive," could be missing revenue opportunities online, says Sucharita Mulpuru-Kodali, vice president and principal analyst at Forrester. "Yes, maybe they could increase sales [by doing e-commerce]." But, she continued, "a brand's goals aren't always to increase sales. It may be to preserve the quality of the brand so that it stays in business for another 100 years."

There's a compelling argument, then, for certain luxury fashion brands to keep their clothes offline -- why, then, do Louis Vuitton, Givenchy, Burberry and Saint Laurent, to name a few, sell their ready-to wear online? That's because it makes sense for their respective business models. Of course, Givenchy isn't selling its couture dresses online, but it does sell oodles of t-shirts and sweatshirts. Saint Laurent tapped Hedi Slimane specifically to ramp up the label's ready-to-wear business, and it's worked. In addition to hot-selling shoes and handbags, Barneys and Net-a-Porter can't keep many of the brand's dresses and sweaters in stock online (though it's possible that the inventory was purposely kept small). That the brand puts celebrities in suits that are similar if not identical to those available to buy at any given time is another sign it is pushing ready-to-wear. A brand's decision to sell product online may also have to do with who owns it. "If you're a public company, you have to err on the side of making yourself more available," Sharkey de Solis, citing Burberry as an example.

"They have their diffusion lines with different prices that are critical to that strategy." Even department stores like Bergdorf's, Saks and Barneys can offer more exclusivity than an online environment because sales associates there can control who gets their hands on the best product. "It's not a democratic process," says Sharkey de Solis. "The best merchandise often goes to pre-existing clients, people who have longstanding relationships with those department stores. [Brands are] counting on those sales associates to vet who should have the product and who shouldn't." Those personal relationships shared between the wealthy and their sales associates also mean that certain shoppers may not even have to drag their lazy busy asses to actual stores to get what they want. "If somebody really wants that item, there are plenty of ways [to get it]," says Mulpuru-Kodali. "A salesperson would probably be happy to send it." Indeed, I've heard of high-end New York department store sales associates texting their customers who live in different cities when new items arrive.

If one of these brands ever did decide to do e-commerce, it would most likely be in a very specific, controlled way. Sharkey de Solis could see a brand doing a short-term "e-commerce stunt," more for publicity and brand perception than to drive sales. She says a brand like Dior could also potentially work with a site like Net-a-Porter to make its clothes available only to its top-spending clients. (Net-a-Porter has a VIP program for its best customers, who are able to buy products before they go on sale publicly.) Mulpuru-Kodali agrees that these brands would need a "gated entryway" to sell online. But will they even need to? Chanel, Hermes and Céline have all done exceptionally well over the past few years -- better than many other luxury brands -- despite their reluctance to sell online. Céline's success is particularly impressive given that it does not offer products in many categories, letting its always-coveted "It" bags pay the bills. "There's no real reason until that market changes, for those brands to put ready-to-wear items online," says Sharkey de Solis.