What do you guys consider a fair and appropriate price to get custom scales made and attached to a razor? I'd like different price ranges for plastic, wood, and any other common material. (I know wood prices can vary greatly so think middle of the road.) I ask because I see many razors with custom scales for sale. I sold one recently too. It's hard to know the right price for every razor razor but if I know the relative value of the scales, I can get an idea of the razor's overall value. Thanks.