I know this type of scam isn't new, but a friend of mine just got scammed into paying $800 dollars for a visionmax projector T.V which isn't worth the price at all.
Here is a website I found that talks about it.
http://www.azht.net/forum/showthread.php?t=117513
He was approached at a gas station in Calgary and was told that there was a extra unit delivered to them and they just wanted to sell it fast so they offered to sell it to him for $1500. The price on the box said $6,999 which was obviously (not so obvious to him) fake. He countered with $800 and they accepted and he bought it. The unit apparently works, but is horrible quality and not even worth $150.
Some will say this isn't a scam, but anyways be careful for these guys around Calgary.