+1I agree 100%. If someone is buying hats purely for their collector's value I can understand why they would want to keep them as original as possible. Me, I buy them because I want to wear them, and if I ever bought a vintage hat with a "dodgy" sweatband I would certainly have it replaced so I could wear the hat. Resale value never even enters my mind. I'm sure that would be heresy to some of the members here, but once it becomes my hat I can do whatever I want with it.