Pennsylvania barn find!!!!

hard to say without better pictures.

how bad are the floors and quarters?

Guarenteed yes..

I bought a 69 swinger from Arizona and it needed 1/4's and at a minum some floor repair for pinholing.

This thing is from PA and it has visible rust.

Edit: To answer the Op's ? Fair price 1500-5000. You'll have 30+ in it for a full resto or completion.