Vintage leather jackets can be worth some serious money particularly Lewis Leathers (Aviakit).
I had a small red 441 jacket and it's a bit loud and small for me these days so put it on ebay about 5 years ago and it went through the roof with many enquiries and offers from Japan. Withdrew it and sold it to a dealer at Kempton Park. Bought my 550F import from DK with the money.