Aircraft Slides - http://www.aircraftslides.com/
Auctions of airline and military aircraft slides. Includes discussion forum and information for buyers and sellers.
BidsTick.com - http://www.bidstick.com/
Bid on the best brands and latest electronics, computer hardware and luxury goods one penny at a time.
TradeAway - http://www.tradeaway.com/
The largest online barter web portal where you can buy, sell and trade auction style for almost any item one can imagine - no cash needed here.