I have a Paiste vintage blue label 602 20" Heavy Ride that has been unused for awhile. It is in excellent shape, very little logo fade, except for one small edge ding. You really have to look for it to see it but it is there and if I can see it -- it needs to be disclosed for any potential buyer. No radiating crack under jewler's loupe/lens. Seeing these sell for upwards of $400+. How much would you reduce asking price for this flaw?