I've seen how unique the Russians are and they are always reported to be the best. Mine is a very nice Norinco and would not consider trading or selling.
The ammo for an SKS etc is much easier to afford, but if you have tried one out and have "fallen" for the G-3, then there is no stopping a person. If you later decided to sell the type of G-3 you are considering, is it the most reliable type or would you lose money trying to sell it?
A guy near Starkville, MS, who trained with it when he served in the German Bundeswehr, let me try his authentic G-3, which has the three original selector positions: 'S' (Sicher), 'E' (Einzelschuss) and 'F' (Freiheit).
My humble vote is to trade it for my SKS.