It is not a bad price if the machine is in real good shape. The JD 454 head is worth scrap price. I just saw one sell Sat. that looked like new and it brought $250. The JD 444 will bring $1500-2000 if it is real nice. The JD 213 will bring $750-1000. So that makes the head worth maybe $2500-3000 of the total price. So the bare combine would be in the $5000-6000. Which it would do easily if it is in good shape.
They are a nice small machine. They will handle the 4 row head well if you have fairly flat ground.