am i missing something? fastcash4bitcoins appears to be a site that buys bitcoins from people is that right? you cant purchase bitcoins from them?
Literally? No. You can only sell bitcoins to FastCash4Bitcoins.
However, the operators of FastCash4Bitcoins, Tangible Cryptography, also operate Bitcoins Direct which is a service where you can purchase bulk bitcoins (minimum $500, maximum $250,000) with either wire transfer or cash deposit (cash deposit limited to a maximum of $3000). They are selective about who they transact with. You have to have a working knowledge of PGP encryption and signatures, and they only occasionally accept new customers.
So when you sell your bitcoins to FastCash4Bitcoins, I'm pretty sure that the funds that that are being used to pay you are coming from money that Bitcoins Direct collects when they sell those bitcoins in bulk.