A friend of mine is licensed to produce these, I get them from him. But I buy in bulk, he doesn't sell individual bills. Try taking some surveys to earn some extra credits, there are quite a few surveys listed on the site for a variety of points.
Yes, I will keep listing auctions for bills. I'll try to have 1 or 2 sets of auctions a week through the summer, in the fall and winter I may list more often. We work full time and in the summer we run our 2 businesses along with working our regular jobs. I really enjoy using Listia to auction my bills!