It's your stereo by all means list it for what you want. Those $200 ones on Ebay are always good for a chuckle. It's not like your holding a working pristine factory 57 chevy classic in your hands. You listed already the reasons for "not wanting" it.. Just a heads up, unless it is a complete Navigation system.. they typically get sold in here for under $50.
Here's you an Ebay example..
Chrysler Crossfire Replacement Head Unit | eBay