Hi Everyone, I have a Halcyon SS Single Cylinder Backplate and Harness – brand new, never used, and a Halcyon Pioneer 30lb Wing – brand new, never used. Both purchased in 2009. So the question - is the wing still good after 13 years? It's been stored in a cool, dry, clean place. It holds air no problem. Should I have any concern putting these items up for sale? Also, any suggestions on a fair price for the backplate and wing?