My boss bought a Deere 401C a few years ago, from the township we are in. Built in late '70s or early '80s. It had 1200 original hours on it. 1-200 hrs on brand new engine (not reman). Every pin is tight on the hoe. No slop. It was mostly used to load trucks with sand/gravel and salt. Pretty clean and straight. I had to sand down the hod and paint it, when we first go it, but that is about it.
IIRC, he paid 12k for it. Great tractor.
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Nearly 10k hours and asking $10. 9k on the one you are looking at? Hmmmmmm. A lot of hours.
I'd look it over with a fine tooth comb. How are the steering components? Tight or loose?
Engine blowby? Is it due for an o'haul?
Good hydraulics? No internal or external leaks?
Does the transmission shift properly? How quick is the reverser to respond?