I paid $17k for my 2005 SRT-6 roadster with 10k miles 2 months ago, and I feel that it was fairly priced. Mine also had curb rash on one wheel plus a small nick in the dashboard.

Based on that, for a Limited with 42k miles and a couple of blemishes I'd figure between $13k and $14k. Maximizing the price depends on finding that person for whom your car is "their perfect Crossfire", and that may take some time.