I saw an Airway vacuum at a garage sale in my neighborhood. This vac may be missing a cap on the round part on the stick (as you can tell, I do not know vacuum cleaners). The bag seems in good shape, though it does not have the airplane logo on it. Is this a valuable vacuum in "good" or "fair" condition? Should I have bought it for $50 and put it on ebay hoping to make a profit? I should have taken photos--sorry, I did not. If it's worth decent $'s, I think I can still purchase. Thank You in advance for any advice.