Looks like a nice pit. I would check to see if there is a lip welded inside of the pit for the doors to rest on and for sealing. The only thing I can see that might need modifying would be to add a exhaust stack at grate level at the opposite end of the firebox. Will allow better Heat flow. Offer him $1200 and see what he says. Cash money talks and bullskit walks. I built a offset similar to that with the Round firebox mounted a little high just like that pictured, and the side by the firebox usually ran 100-125 degrees hotter near the firebox. For that $$$$ you could get a Lang 48 and if you equate actual useable cook space, they will end up being nearly the same. Unless that pit has tuning plates I will bet its gonna run way hotter on one end. The square fireboxes with a little extra height always perform better. Good luck if you decide to purchase the pit, it looks super heavy duty.