I've bought a few things off hondaclassifieds.com. Bought a "complete" teg brake booster and MC, turned out the MC didn't have a cap ($50 from acura). Bought a four wheel integra disk conversion, turns out one of the trailing arms was from a DB integra rather than a '94+ one-- I had already removed the stock bushings and found that my ES ones wouldn't fit into one trailing arm, while the car was in peices I had to pay out the ass to overnight the right one from Jerome Soh. (sohfast.com--expensive but good, a little slow on communication tho). I hear of people getting ripped off all the time on hondaclassifieds. A good place to browse, a bad place to buy. Also, steer clear of a guy named Chris Jew, some broad claiming to sell her boyfreind's engines, etc..

:edit: oh yeah, I also bought integra rear control arms, turns out when they were shipped they were civic ones. I emailed the dude and said, "wtf, i need to mount swaybars" and he said, "well theyre really teg ones, I just filled in the holes for my 'trick suspension setup'," I was like "...right, theyre not even remotely the same shape." --He ended up giving me my money back, but I have never had a smooth transaction on hondaclassifieds.com

THe selection isn't as good, but I'd feel much more comfortable buying from the FS/t/wtb forum here on HAN... At least there's some element of accountability. And on ebay, at least you can check their feedback.