i've had several people i've had successful transactions with on here. anything in bold were exceptionally great transactions:
SNAPCALLHERO: met up with him in person for a pretty large purchase of many items. he gave a deal for buying multiple things.
wizang: bought a video card off him, he shipped after payment, i received a couple days later, card works great.
ataranlen: he bought an unused game off me, he sent the BTC and i sent the code, very quick, easy, and hassle-free transaction
deslok: he bought a KVM off me, i couldn't find all the cables it came with so threw in some mismatched cables and he was ok with it, shipped it out and he received it.
toasty: i bought 10 flash drives from him. they all came with only 3.27gb instead of close to the 4gb, so he was very helpful in trying to help me re-partition it.
critical: he bought 4x 5850 from me, i personally delivered it to him an hour later after i got the payment, and everyone's happy.
Trini8ed: he rented 7gh/s of mining from me for 24 hours, he sent payment first and i started to mine on his pool. there were some connection problems with his end of the server, so he didn't get the full 7gh/s speed, but he didn't give fuss about it.
amazingrando: bought many video cards from me, and it was one of the larger transactions i've had. he paid everything in full plus a little extra, so i refunded him the difference. everything was smooth.
cuongnq: very negotiable and i bought several brand new things from him. i had several transactions with him, not just one.
pigki: i found out he was local to me, so i met up with him at his house two different times for 2 separate purchases. great guy to meet with in person, had a small chit chat about bitcoins also.
bob777fred: one of the best transactions i've had. he was a new member, had no pictures of the item, and had no prior transactions or feedback, so i asked him to ship first. not only did he give a discount for buying two, but he had huge balls to ship me 2 video cards before i even paid him. it takes a lot of trust to do that, so i fully vouch for his legitimacy.