ChampChump,
Go for it! Items in the aviation section on ebay go for silly prices. At one point I was buying hi-vis jackets in the local market for £1.50 and selling them on ebay for £6-10. I was doing it for charity though, before anyone accuses me of...well, anything.

You'll probably get a fiver for your 73 cent "specially imported from the US" kneeboard.