I seem to recall someone getting court martialled for putting a spare helmet on ebay..... I think you may struggle to find one.
Shame really, that if there is a demand for old flying kit and other items of interest that some senior jobby doesn't make a case for not just scrapping all this kit but selling some of it, at a nominal cost and with whatever H&S 'not for use' provisos etc, and put the money into new kit/ benevolent fund/ help for heros.....
Given this recyclable to cash potential I think we owe it to the public to be as efficient as possible.....