Looks good. A few simple usability suggestions... put the search box on top to avoid user scrolling to find it, default it to "name" (hardly anyone has ipdb number), and the header text in the results is a bit funky in Chrome (looks fine in Firefox).

Now what would REALLY differentiate this site from all others is to have a condition rating for each sales price... I know this is only available in a minimal number of cases but without it the price variation will be so large that they are only borderline helpful. Difficult, I know...