Used Champion graders?

I might be in the market for an older used grader and Champion's seem to be the most common for a lower cost older machine. I've seen a few older D740's listed around $15K a D680 for $10,000 a D562 at $12K and a D600 for $12K. I'm wondering if it possible to buy a decent older grader in this price range and if certain models are more desirable or should be avoided. I don't need a big grader and it won't get a lot of hours but does need to be somewhat reliable with parts availability. I'm a...

Used Champion graders?

Used Champion graders?