Suggestion: You should be able to exclude certain data items from the calculation, then recalculate (check box for exclude next to the raw data item or something). I just did a search for "fender aerodyne bass guitar" and the lowest price that came up was $249.99, though that turned out to be only the neck of a bass "2007 Fender Aerodyne JAZZ BASS NECK Tuners Bass Guitar Black Headstock".