Not really.
If you can get access to their site (
www.manheim.com), you can peruse the post-sale lists and try to find your vehicle. I can't recommend doing that.
How much is marked-up depends on the vehicle. An '05 7 series? Figure about $7k. An '05 Camry might be more along the lines of $2k-$3k.
Carnutzzz
Product Development Manager
Manheim