Here's a 1650 I've done some considerable work too. When I got it, it didn't run, needed a lot of work, hydro wouldn't move, and pto didn't work and was destined to be parted. Includes the 10.50 ags that are pictured. This would be a perfect one for restoration. No wear around where the hood meets the fiberglass dash, no pitting or rust on hydro lift handle, aluminum front lower grill, straight uncracked metal all around, side panels included, original muffler box completely unbroken or beat up.
The good: As well as what's mentioned above, fresh oil change, no smoke from motor, new head gasket, cylinder wall and valves looks clean and not worn or scratched at all, new points, new hydro fluid and almost new filter. Bigger 1" front spindles. Carb was completely gone through and new gas line and in tank screen. I put a nice battery in it.
The bad: Not original gas tank. Someone put a metal one in it that works but isn't original. Seat in typical cracked condition. None of the lights work and need completely gone through to work. Front tires not great but at least both are tubed. ISO mounts look good and motor doesn't move around a lot but has some vibration easily noticeable.
I've cut with this tractor. Lots and lots of power. Could probably use some minor attention still if going into regular use but the thorough description gives you a very good idea of what it is.
$650 May consider partial trade on cat 0 plow or 12" plow or other cat 0 attachment. May take small partial trade on another tractor but not preferenced.