Calling all Musicians out there

For bass players, there's "TalkBass.com" which is a great community, and also provides classifieds.

Harmony Central (http://www.harmony-central.com/) has a number of musician forums, but I believe there are better ones out there. It might be a good place to start your search.

I think the closet thing to Audiogon for musicians is Harmony_Central.Com. The site is primarily slanted to guitar oriented interests. I have bought and sold guitars in their advertising section with very good results. I think that a more serious, less flakey crowd is found there compared to Ebay. Best of all, the ads are free (at least the last time I used them.) There is an owner review section for intruments that has been a wellspring of good advice for potential purchases.

Yup, Harmony-Central is ok if yoy play acoustic or electric guitars, bass or drums. Some of the forums are fairly off-topic at this point but there are also a few good ones like the acoustic guitar and live sound forums. Lots of review resources and classifieds though. There are quite a few musician forums out there for pretty much any kind of instrument. Just google around.