Mexican consumer law helps man snag $28,000 earrings for $28 after Cartier pricing mishap

Designer jewelry doesn't come cheap, unless, of course, you find it online for much lower than it should be.

That's what happened to Rogelio Villarreal, who was browsing Cartier's Web site when he started these diamond-encrusted earrings for 237 Mexican pesos. That's around 11 British pounds. He bought two pairs, who wouldn't, before the price was quickly corrected to 237,000 pesos, or just over 11,000 pounds.

According to Rogelio, Cartier then tried to back out of the deal, but he asked Mexico's Consumer Protection Agency to get involved, and they ruled in his favor. So how did he do it? Well, Mexican consumer law requires businesses to sell their products at their listed price.

If they don't, customers can file a complaint and send proof that they bought it at that price, but haven't received it. At this Central London jeweler's, they say there's no doubt he got a bargain.