AGON as a platform is just fine, but there are other audio forums that are as good or better IMO. Think CANUCKAUDIOMART and USAUDIOMART. In addition to a comparable reach, they won’t dip into your pocket for a cut of the sales proceeds.
I’ve had a few AGON deals with no complaints and 51 EZPZ flawless deals to date on CAM/ USAM ….And no IRS income tax reporting for the latter.
Vetting all prospective buyers vis-a-vis their posted positive feedback (or not…) in any audio forum listing is key. There are many “problem” types out there …. Yes, they DO walk among us.