bought used magnaflow mufflers from Bobby Levasseur (can't remember user name) and was very fair. sent me pictures of items, they were just like the pics and just as described. shipping was quick enough.
just bought k&n from ajusa and they sent me the wrong one...will get back with everybody on their customer service to let you know how they handle it.
bought a sunroof motor assembly from kaotic1100 and was as described...wrapped up real nice too.
sunroof motor gear stripped with first use though. not sure why that happened. didn't look stripped before hand, but definitley was afterwards so it wasn't his fault. fixed now though.
