thanks one of the moderators explained it to me.
Apparently saying "BTC For Sale" means youre "buying" dollars.
Seems odd to me... If I were selling a video card, I wouldn't think of it as "buying money".
In my opinion, if you are selling anything, it means you are selling, whether its BTC, or handmade Native American Moccasins, or wooden nickels. But of course, I'm not an admin, and so my opinion doesn't really matter
It's just tough to put into my head "OK, I want to get BTC for something... am I selling something, or buying bitcoins? Or selling bitcoins to buy bitcoins?"