There's two versions of the 316.... up to 95,000 used a Kohler single cylinder engine and the rear attachment mounting system was the same as the 140's.
The later version, 285,001 and up used an Onan twin cylinder engine and introduced the later hydro transaxle and attachment mounting system that the later 318's, 322's, etc. used.
The later version also used a much better, heavier-duty cast iron steering gear.
Any idea which series it is, early or late?
Both are TOUGH tractors.
$1500 would be WAY high 'cept for the new engine. HOPEFULLY it's a well-done conversion.