Introductions & Greetings - Depreciation

I have a 2001 Pontiac Trans Am Ram Air that I bought last year, with 48,000 miles on it, it has 55,000 miles on it now. Could someone tell me their opinion on how much it would depreciate from 2011 to 2012.

I would hope (being in a similiar boat w/ a 2002 z28 going from 27k to 35k) that the value should stay about the same as long as the vehicle stays in the same shape.