All depends on what it is,what it looks like, and look around to see of there oil in their shop. That way you know oils have been changed in done machines. My rental place has all junk. They will sell it but for new price. Most of their stiff is 20 years old. I know one place sells their stuff yearly. Now that would worry me about engine up keep.
I guess it all comes down to price and risk. Also of you know the place and how the up keep of Thier machines
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