My decision to sell games is always based on whether or not I still derive enjoyment from playing it, rather than how rare it is or how much I'd get. If I still play a game, I'll hang onto it. If I don't play it anymore, I'll sell it on (usually to a mate for a couple of pints).
One important exception to that rule: Total Annihilation. I've got the original and the two add-on packs and they are not leaving my possession unless they are wrenched from my cold, dead hands!
One important exception to that rule: Total Annihilation. I've got the original and the two add-on packs and they are not leaving my possession unless they are wrenched from my cold, dead hands!