I have this MC519 dump cart for sale, and I believe it goes on the John Deere 425, 445, and 455 garden tractors. It is in decent condition, with minimal rust. It is used to put a bagger on, then you can dump the grass clippings out. I don’t have the bagger part, though. I believe the only difference between using it on the X-series tractors is that it would need a wider bracket to mount on the tractor. I would like $175 obo for it, and it is in SW Iowa.