Feel free to post at
Scam Accusations if you smell a scammy behavioral.
Looks like OP didn't communicate well enough, and @bitcofan misinterpret what OP wants.
You have to pay for samples too, it is job done by the other person and have to be paid.
I believe what OP means is just wants to test the candidate first, So OP doesn't require to pay for the samples worked. As I said its probably just lack of communication.