I logged in just to respond to this - I could not disagree more. FB's faceted search is truly awful. I regularly search for specific items on FB and get totally different results if I run the same query multiple times. Sometimes, I'll even get "suggested" items that 100% match my search query and have been posted for weeks but still don't appear in my original search.

I loathe using FBMP, but it has been slowly absorbing all the CL traffic. On one hand, I like that CL charges for high value items now (ex: Cars) because it means you're getting better quality, but on the other hand it has absolutely hastened people's abandonment of CL for FBMP.