It comes down to balance. Take what you need, leave the rest.

I found an overlooked stash of 70% Isopropyl the other day. My first reaction was to grab several bottles, then I thought that I don't need that much and the next person might need it a lot more than I do. So I bought two bottles and left the rest. Small decisions like that can add up in the long run and we are in this for the long run....so....balance....