For those who want to get the best bang for your investment. As a card dealer who travels to many shows throughout the year (well...I used to until the sportscard industry started to tank again a couple years ago), these are the most valuable Cassel cards out there in order.
1. 2005 UD Exquisite Matt Cassel RC Auto #'ed to 150
2. 2005 UD Ultimate Collection Matt Cassel RC Auto #'ed to 225
3. 2005 Playoff Contenders Rookie Ticket Matt Cassel RC Auto not numbered
4. 2005 UD SP Authentic Matt Cassel RC Auto #'ed to 850
5. 2005 Bowman Chrome Matt Cassel RC Auto not numbered
Other good ones to look at that will be a little more affordable are the Bowman's Best autogrphed rookie, the Leaf Rookies and Stars SP, as well as any other serial numbered cards or autographs.