If you want to trade on these boards I’d suggest you participate in threads other than those specifically selling books, get to know people, who’s who, and get references from who other collectors have dealt successfully in the past. Get your feet wet here, don’t necessarily start with a 1k comic, try and work some smaller deals and build a rep, so to speak.
Part of what sets this place apart from eBay, Facebook, or other platforms is we’re not all just sitting around trying to buy/sell to one another. We also chat about comics, the stories, creators, etc., just about anything surrounding the hobby.
Also, do your best to keep out of scenarios like that WWBN 32 thread that blew up and left everyone feeling uneasy a couple months back.