I went looking for the 222 and was unable to find it. I did find the 3014 and was not terribly impressed with it. A well-cared for tractor should not have peeling decals or need touch up if it only has 600 hours on it.
I did see multiple listings for the same 444 that began life as a 200 Series and was converted. Do not touch something like this with a ten foot pole. Conversions are done by ignorant people that do not realize the true differences between the two series.
Aside from the 444 model, Case also made a 446 and a 448 that were powered by 16 HP and 18 HP Onan flat twins. These are excellent tractors providing you can find one with a low hour engine. I was steering you toward a 444 because the K-321 Kohler engine is very inexpensive to rebuild whereas Onan's are not.
I have given you a link to a 446 that may not be too far from you. It does have the 3 point hitch but I do not see the rear PTO kit on it. This one claims to have 750 hours on it and the condition looks to be good enough to support those hours. It comes with tire chains, the front weight kit and a utility blade.
In my opinion, tire chains are worth about 50 used, a really good utility blade can be worth up to 400. The hitch is easily worth 400 to 500 currently. He talks about a front weight kit but no photo. If he has the suitcase weight kit, then that will easily bring 300 to 450 by itself. If it is just a front weight box, then that's worth about 80 if it is in good shape.
So right there, you have a possibility of 800 plus in optional equipment if all is in good shape.
Providing the hours are true, then a 1987 Ingersoll 446 would be worth 1200, especially in the Rhode Island/ upper Mass area. Prices seem to be much higher in RI for some reason.
If the tractor checks out and is within your budget, then I'd offer him 1800 cash on the spot. Cash in hand talks very load, especially when you come with a trailer to take the package away immediately.
At the very least, do a compression test on the Onan. Anything above 90 PSI is OK. Over 100 is better, especially when both cylinders are within 5 LBS of each other.