Not exactly CL but on buy/sell sites I've:

Bought my truck.
Found bro's truck.
Found dad's truck.
Put up ad and sold 3 family cars.
Bought countless video games.
Sold video games.
Ripped someone off by selling them a 3 year old Xbox for 300 bucks (felt bad but whatever.. stupid people are stupid people)
Sold phones.
Bought 80GB iPod Video for $50 bucks.
Bought/sold truck accessories.
More stuff that I can't remember.

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2008 F-150 Supercrew Lariat 4x4, 5.4L.
2007 Ranger Supercab FX4, 4.0L, Accident mod done in December, 2012, totalled.
1998 Ranger Reg. Cab, 3.Slow. Sold, then totalled.