Though not directly on point, I would suggest that eBay prices can vary for a bunch of reasons besides color; no two cars, nor two auctions, are alike. If there happen to be two guys really psyched for a particular car, it can drive the price up for just competetive reasons, like on the Jackson-Barrett TV show. Maybe one seller has maint. records, or has great feedback, or will deliver the car, whatever.

Anyway, mine is silver-blue, obviously the best color!