I'll add that eBay's search is really good if you know how to use it. By use it I mean encapsulating every important phrase that you want to include or exclude

I'll add that eBay's search is really good if you know how to use it. By use it I mean encapsulating every important phrase that you want to include or exclude within parenthesis and using commas as "or" statements within the parenthesis, such that "(phrase 1) -(phrase 2, phrase 3)" will return results for phrase 1 and exclude any listings that contain phrase 2 or phrase 3. It also pays attention to spacing so that only exact matches are returned.