I bought mine off craigslist. I think 30 bucks a piece. Cost is in my post. They are 15'x48'. Not anywhere close to a true pond liner as far as material. The Firestone EPDM liners are really thick and tough but look at the cost difference. It cost me like $270 to do mine. A true liner would have been in the thousands. If you are looking at the cheaper pvc/vinyl liners online, these are basically the same quality and will hold up just fine from what I can tell so far.