Given the deals people seem to be getting along with low new car financing, you may have to set your sights lower. That being said in the Denver market there is less inventory so you might do better than some in high volume areas like SoCal and Florida. How did you do with the sale of your 08? Might be the best proxy for you.
If it helps, 2008 5/5 E90s with low miles are going for high $40s on Manheim auctions.
BTW, still want to sell your 19s?