How difficult is it to reseal a large tank? Someone is advertising a very large tank, 72x30x36 (although he says it's 250 gallon) but he says it needs to be resealed. I imagine it's an old tank and very very very heavy. I might try to low ball him even though he isn't asking much but I'm not sure if I'm up for sealing a tank that large and chancing it leaking / busting.
