I'm convinced that people on Facebook Marketplace can't read

I'm in the process of selling an RV. Made every issue about it very clear to the extent I needed to make them. I even mentioned the number they need to contact if they want specifics on the top of the description so it's the first thing they see since I'm just the middleman.

But these people... good Lord, did they even go to school growing up? Does the English language fly past their heads as they send me "Is this still available?" among other things?

I get they want to buy things and I'm selling things, but for fucks sake they should learn to read the description BEFORE DMing me. I answer what I can when I can to the extent of my knowledge, but being the middleman, I cannot answer everything so they need to contact the guy I'm selling it for. It's so annoying.