They're fairly expensive new, so doubt a lot of people have bought them and then willing to sell them for less than you can get a decent 19L corny. Some of the early ones also had issues with the base 'popping out' or tin canning, so that it had to be thumped back into place. Some of the early ones also had some dodgy construction methods, that made them less than desirable.
Better option would be to buy new from either Malthouse (welshpool) or TWOC (Bibra lake; www.homebru.com.au) or try one of the site sponsors if shipping suits you better.
P.S. :- Have requested a Mod move this to the Marketplace.