Low miles, Georgia short/mid with a DT466, solid trans, newish tires.
Many here would & have paid twice as much as you did. Well done, Sir.
Slow-Grows-It has two of the most desirable evaporator units available on school buses. Most of us have skull knockers or worse, nothing at all. The front and rear bulkhead units are the stuff of skoolie fantasies.
Another score, is the roof top condenser, which frees up the limited, accessable space underneath. They even left the fire safety & emergency equiptment on board.
Do the (2) driver and (2) passenger fans work while the engine is off? Do they oscillate?