Not sure where to post this to get your attention so will do it here. :-)
I see you are using some firm to advertise your products on various side banners etc, trouble is I don't think you are getting the best service for your money. The only adverts that I see are for items I have already just purchased, so a bit late to be paying to advertise it to me if you see what I mean. If its pay for click then you have not lost anything, but it would be more useful to see items I have not purchased.

Just a thought. :-)