I really enjoy http://www.FlexOffers.com they have a huge variety of programs and products. It is FREE and Easy to configure. I have not seen your website but I suppose it is divided into category listings. Because FlexOffers has so many programs covering many different industries you can have very specific/relevant ads running on your pages.

So if you have a used CD or DVD section, you may apply for programs in that area and have those Ads appear only on the DVD area while fashion/shoes/apparel affiliates ads can run on your clothes category… Give it a try, as I said, it is free.

Oh, I almost forgot to mention they have many different technological ways of displaying your ads, so even if you are not a super programmer you will still be able to make it happen