I'm having a shop install a new stereo system in my 1993 300E tomorrow and am wondering if my factory unit is worth anything to anyone. It is the standard AM/FM with cassette and 6 disc changer in the trunk. Should I recover all of the stuff from the installer and Ebay it or is it even worth it?

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1993 300E 2.8 185k miles
2006 Mustang Convertible 4.0 Eaton Supercharged