however I would be OK with a sticky post in the bst dedicated just for these random looky whats for sale here type post that are not relevant to most.
+1000 (but it wouldn't let me vote 1000 times!!!)
Some of my earliest posts were where I thought I had found great deals and wanted to share them with folks that may be local. That didn't last long because eventually you discover that the majority of deals actually aren't on the usual spots like CL or eBay ... and also realize that anybody who is interested has already seen what you are posting.
Having said that, there are things that new folks are excited to share ... and some new folks may not have seen ... and it would be a shame to dampen their enthusiasm (save that for when they ask "What is the best joystick" or "Should I use an X-Arcade").
A dedicated stickied thread for "NotMine - Found This On eBay/CL" solves the majority of the problems while providing the majority of the benefits.
I've been trying to sort whether or not references to sale items on other boards should be included/excluded. I typically don't post stuff I see for sale on other boards, unless I know someone here was looking for that item and can't remember who it was.