I check Fauna, KS, and TRRM. I bought a 1.1 Tarahumara Boa pair this week from KS that wasn't advertised anywhere else.
On TRRM the reason you don't see many "views" on ads is that between the ad's title, preview, and picture I can get all the info I need without having to actually open the ad. That is not the case on Fauna or KS.