Does the film advance lever wind when you wind it? Does the shutter work? Shouldn't need a battery for that much info. All a battery would tell you is if the meter works. http://www.butkus.org/chinon/ricoh/kr-10_super/kr-10_super.htm
Seller needs to get verified. I'm not saying you auctions aren't legit, and I understand everyone has to start from somewhere, but serious bidders will shy away from your auction if you don't get verified. Pay pal accts are really easy to set up and it will save you a lot of grief. Good luck, I really want your camera but not willing to take a chance. Been there...done that!