Have a guy selling an F2560 with bad hydrostatic transmission. Apparently it locked up after starting it one day and broke/twisted the input shaft from the engine to the transmission in two! The engine looks and runs fine, but the hydrostatic transmission could be a big cost. Is it possible to rebuild the transmission or is it likely I'd need a rebuilt or new one? Not sure if anything else could be damaged. He wants $1000 and is firm on that. It has a 72" mower deck in good shape. Thanks, Brad