Gas Gauge Malfunction

vtcodger2 described EXACTLY what happened to the gas gauge on the instrument panel. I know it sounds impossible and my husband thought I was nuts when I told him that the needle was on the WRONG side of the stop. (thanks for helping me with all the correct terminology) The car is no longer under warranty, unfortunately. I am a very low mileage driver so I will be keeping the car for at least 4 or more years. But if I do decide to trade it or sell it, how much will the gas gauge situation affect the resale value–will the low mileage offset a broken gas gauge?