This is neither "family" nor is it "business". It IS opportunity. One man's trash is another's treasure. If a close friend, I'd suggest an "offer" to be polite. If declined, happily take the tank.
"Freedom is not merely the opportunity to do as one pleases; neither is it merely the opportunity to choose between set alternatives. Freedom is, first of all, the chance to formulate the available choices, to argue over them -- and then, the opportunity to choose."
Dave "renman"