To be honest, I doubt it would matter, a dealer would at best offer $1k for an EA no matter what the condition. So I wouldnt even bother washing it for them.
But if you want to sell it privately, fixing some of the easy things should get you a bit more.
1993 ED XR6 M5 (1 of 329)
Turbo on the way!!
1993 EBII Fairmont (Now wrecking, PM if you want any parts)
1988 Nissan R31 Skyline