I was hoping to get some advice on what everyone thinks I should offer to someone I know for a Duble Duck Goldedge square point razor. It's someone I know that bought it from a barber for only $20.00. The razor is brand new but not in it's original box. At least, I don't think it's the original box. The scale is slightly warped to the point where you have to lightly bend it to close it. I'm not looking to try to steel it and I want to give here what's fair without ripping either one of us off. Any suggestions will be greatly appreciated.

Thanks!