Cost of a gas tank replacement?? on 1999 Buick Century

This car leaks gas everyday no matter whether we park on flat ground, up on a hill, or facing down. We don't really know what it's from, but I figure it could be a hole in the gas tank. How much do you think it would cost to replace the tank? We're trying to figure out if it's worth it to replace the whole thing or to just keep on driving it until we need to get another car.
Thanks very much.

Asked by for the 1999 Buick Century
1 answer 1 comment
aftermarket tank 225
labor is 2.2 hours
accessories 35

Thanks for this Roy. So that would be the 225 + 35 + the cost of labor? Do you happen to know what the cost of labor might be?