DO NOT BUY ONE FROM ALFA HEAVEN!
They're a company in Wisconsin and they specialize in "rebuilding" CUCV's and deuce's. They're scam artists and their rebuilding is mainly repainting and cleaning. Lots of people got screwed on one of their over priced, under repaired, and fresh painted trucks. Myself included.
Remember most CUCV's are lower mileage and at least decent to better shape than similar vintage civilian trucks. Anyone selling one as a running, driving truck is going to want fair value for that, not just a set of axles. I got $4750 for my 55,000 mile M1008 mine back in the summer.
If you just want axles you might be better off looking for just axles than a whole truck.
Check out Idaho Motor Pool. Bit closer to you than NJ but a good place. Also 100dollarman off of Pirate.