Where do they bill out of?
There are a lot of places where you can get a Visa / MC / AMEX gift card for
BTC but they are region locked a lot of the time.
Partial list here:
https://bitcointalk.org/index.php?topic=5208530.0Due to the nature of the site I'm guessing you are a member here who does not want to come out and say who they are so you started a throwaway account.
Most people are not going to want to put their own credit card in a site like this so they would probably want to get a disposable card anyway so you would have to go for more then then $3 you are offering. At that point might as well do it yourself.
-Dave