You got a pre-installed $600 In Dash Alpine 3-disc changer Cd-Player. It is fully fucntional with good speakers.
In all seriousness that does suck. Even with the rust though if it is mechanicly sound you probably could get $1,500 for it.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes