If they are together (owned by the same person) I'd start with $750 for the pair. If seperate $400 or so.
To be honest, if it was me I'd ask the owner if he wanted me to remove the junk for him. Might make a little more work to take them with some other stuff, but for me it would be worth it. You'd be suprised what treasures people will give away just to get rid of them.