Yes! If you are buying banner place, and you need to pay just for received clicks, then Yes ! But if you are buying it for monthly price, then .. just try it
Banner Buying can be a goldmine with Clickbank Products. I tried a total of 4 different places to buy banners, and 3 are profitable. Here are the keys: 1. Site must have decent traffic and be related to your niche 2. Price must be low or reasonable. 3. Your banner must be placed in a decent position. Since you are dealing with direct webmasters, prices and such may vary, so make sure you check it out thoroughly. Some private site owners want way to much for what they offer, and some are just out to cover their hosting and offer incredible deals. Find good deals, test them for a month, if they are profitable, lock into a long term deal.