pass. door wont open

Im bout 2 buy a 89 s15 and the pass. door wont open. The guy said that when he bout it that the person before him had to replace it because of rust. It wont open from the outside or inside. How do I get it open? Thanx all

Rods must have fell off.Go fishin with a clothes hanger or somehow get the inner door panel off.Make sure it's not just stuck first.