My thoughts on the 322...
Of all the Yanmar powered 300 series, the 322 gets my vote. They are essentially a 318 with a liquid-cooled 3 cylinder gas engine. The engine is based on a stout diesel design so they are over-built and last if you take care of them. They are quiet, smooth and do good on fuel.
As for appearance, Deere had problems with powercoating in the 1988-1990 range so don't make all judgements about a solid machine based on appearance.
The late 38 two-blade decks are know to give an excellent cut so don't rule it out. I'd grab it on the tractor and look for a 50 deck along the way.
As for price, depending on the hours and location it might be a fair price. I cannot speak to your location.
If I had the $ and had the choice between the two, it would be the 322 for me. The 300's are solid machines but the 322 will work circles around the old closed- frame machines.
Edited by Trav1s, January 07, 2018 - 01:08 PM.