Those wheels usually go for between $400-600 per set in decent condition. Up to $900 if they are near perfect.
I have seen a few of those cassette deck and eq combos go for $250-300.
Don't sell either, dollar wise it's not worth it and you will be sorry later. If you have everything else for your car keep it.
If I was dishonest I would tell you the stereo combo isn't worth a thing since I need the cassette deck for my 89 since it got lost between me buying it back from the same guy I originally sold it to in 1993.
With that said, keep the wheels and the tape deck and sell something else. If you ever go to sell your car, a guy like me will be pissed that you don't have a complete or near complete car.