Need some help from the experts! My girlfriend is running an estate sale this weekend and the owner has 3 old bikes that we are not sure of a price to put on them. I've included a photo, one is a Huffy Dragstar 3-speed, the girls bike is a Sears Spyder and a Huffy Pursuit 10-speed that I'd guess is from the 70's. All 3 are in great shape, the owner kept good care of all his things. We just don't know for sure the price range these bikes would sell for, or even if the 10 speed would sell? Thoughts? Thanks!