Personally, it doesn't bother me that gear on ebay is posted here. I can skip it if I don't want to read it.
What does irritate me is subject lines like "Buy this now" or "Stuff for sale" with ZERO indication as what is in the post. I realize a subject line isn't large enough to list 20 items, but at least a general description would be nice. Generally, in all forums not specific to HRBBS, things that aren't obvious I just skip over and ignore due to lack of time.
But that's my fault, I participate in too many forums, online and email.
Thsi is more of a hint than a criticism, I guess.