I have 3 ads available on Blogging4Everyone. This is a PR 4 blog, with an Alexa of 300,000, 1,100 uniques already. $3 with discounts available for prepay. I also have 3 ads for $1 on Amazincash. Great for shopping blogs/affiliate programs. Not sure of exact traffic, but was nearly 2,500 uniques last month and growing. PayPal only and if they don't bring you traffic and you have VALID proof, your money back.