Whilst it is relevant to know whether donated goods are sold, or money is put into general pots or earmarked for specific projects, I don’t think that either of those things should determine whether you donate to a specific charity.

I think that if it’s a charity that does work that you value and you are happy with the way it is run, you should be able to trust it to use whatever is donated in a responsible fashion. If there is no need for goats in Country X, but there is a need for oxen in Country Y, but you’ve restricted your gift then it’s wasted. Similarly, if no one needs your used car – including you – then what does it matter if it’s sold and the money benefits your chosen charity?