For sale is a Teledyne Laars 250K BTU pool heater. I bought it at a bankruptcy sale. The owner described it to me as working. I never tested it. I planned on using it for my own pool, but realised that my gas piping was not enough (it requires a large diameter gas pipe, I believe 1.25" diameter). I decided that it is easier to sell than to replumb my gas piping. I am sick of home improvement and do not want to take on any more projects. So my loss is your gain.
If you pick up locally (cash on local pickup), I will give you a one month return privilege. Bid with confidence.