Welcome here and wow!...
Many likes for doing the right thing, if me was very rich I would have bought it for you to have.
If everything is ok and its overall in the good shape the picture suggest, I guess that will easily fetch around $4500.
Plz check if there are batteries in it, you don't want them leaking in the electronics cavity.
Also there should be a blue box and a 5-pin XLR cable (though it can be used without it, but these drain batteries very fast)
Many will most likely chime in here, maybe even a potential buyer. Good luck!