A friend at work has a bunch of razors her mom wants to sell. I was gonna buy some but I want to make sure I give her a fair amount. How much do you usually pay for beat up razors? They all have a fair amount of rust and black staining. Theres a Dubl duck and w&b that need scales as well. I've never bought a razor that wasn't shave ready so I really have no idea how much to give her. Any help would be greatly appreciated.