A South Florida teenager said people should beware, that buying or trading collectable or vintage sneakers online isn't a slam dunk.

"I knew right away, when my father brought them home, they were fake," said the alleged victim, who asked not to be identified.

Trading and buying limited-edition or vintage sneakers has become the "in" thing online and at gatherings around South Florida.

The 14-year-old boy said he found Air Jordan DMP 11s on a Facebook page where people go to buy, sell and trade. He says he offered up two pairs of his real sneakers worth $300, his father made the exchange in a parking lot and brought them home.

"I asked the guy online for pictures, and he showed me real pictures. I was really upset," the boy said.

Sneaker expert Clyde Edwards, who works at Mr. R's Sports on Lincoln Road, said people need to be more educated.

"On the a real sneaker, information is embroidered into the shoe. On the fake, you can usually pull out the information tag. You can also tell by the leather, stitching and the soles," said Edwards.

Local 10 recently shot video outside a Fort Lauderdale nightclub where people had come to sell, trade and buy sneakers.

Every month, there is a new location posted on Facebook, and hundreds showed up.

"I probably have 70 pairs displayed in my closet right now," said collector Isaias Rosa.

Collectors said some pairs of sneakers double in value overnight.

Edwards said he had a pair of LeBron Miami Vice Elite sneakers he paid $250 for.

"Right now, if you wanted to buy this shoe, you'd have to spend $500 or more," he said.

As far as the 14-year-old, experts said the deal was too good to be true, and that should have raised a red flag that the shoes he was trading for were not worth $1,000.

It's hard to pinpoint just how extensive the problem is because may people are simply embarrassed to report the fact they have been ripped off.

As for the person who sold the fakes to the 14-year-old boy, after the transaction, that crook yanked his Facebook account, which was likely a fake, as well.