At
130point.com you can see what the best offer accepted price was at eBay. For a particular listing, click on the search eBay Marketplace Data icon and paste the eBay item's title in the search bar, and that listing should be the first result. The general search doesn't work very well just by movie title, etc., as it doesn't include a lot of the sold listings for that search. I haven't tried the searches for other websites' sales.
