I'm in the same situation. I have a glass 150 that I'm looking to get rid of that needs to be resealed. I tried Craigslist for $200.00 including all of the silicone to reseal it with, no bites. I put it up for free if someone wanted to reseal it themselves less the silicone or use it for a reptile tank, again no bites. These tanks are like $1000.00 new now and not easy to get. I hate putting it out to the curb but it seems like that's going to be my only option at this point.