Well, if you post enough you should develop a good reputation (unless you're doomy or boingboss in disguise

Try buying from reputable amiga.org members who have bought/sold stuff already. For new kit, you could always try Amigakit.com, he has even NOS A1200s and CD32s for sale. I've never had a problem with anything Matthew has sent. Redrumloa is a long-time seller with a new on-line shop and offers occasionally direct buy options for Amiga and C64/128 stuff to members here. I could also recommend Jens (Schoenfeld) of Individual Computers, though most of his stuff is direct buy through resellers like redrumloa and Amigakit. Mika L. (user mrmkl) is a hardware developer of the 68000 ide adapter, he's very honest and a good option if he makes another run of these cool adapters. Effy, DJBase, BenShep, Gdanko and many others are also honest guys. The list goes on and on really. It's really too bad a few scammers have hurt some members, but I'd have to say the vast majority of folks here who post often are an honest, albeit sometimes cranky lot.