Welcome to the forum. I am not sure why you are asking? Are you asking about a single, double, or triple spindle? I know that the longer the blade, the slower the tip speed.
Welcome to the forum Silverstreek. There is normally a little wriggle room and normally you can get some extras, like filled tires, free delivery, and sometime reduced attachments.
I normally have 600 lbs. on the 3pt hitch and another 600 lbs. in the rear tires and there have been times when I couldn't carry a full bucket load as it was too heavy.
Welcome to the forum. You didn't specify what he paid for it but it looks in fair shape for one that old. How many hours on it?
I have a sister that lives in Dunlap and one in Pekin.