Could be wrong here but the pto for the mower deck is 2k while the one at the end of the trans axle is 540 but it still might work.
At that Price You Better off Buying it New Because He doesn't say what tractor it was Mounted On so You May need a different Drive Shaft Length Unless it was on a X465 thru X749 Model then it's direct fitI did find this one that I think will fit but, man I don't want to pay that much.
http://montgomery.craigslist.org/grd/2707095600.html