What would the estimated cost be for a Used 1993, Sears Craftsman, 44" Riding Lawn Mower, in excellent condition?

A 14 year old mower could have a lot of hours on it. The hours are a bit more important than the actual age. Engine type and size would be more helpful but I'd put this around $250. You can buy new mowers with 13.5 hp for $850, that might also be a wise consideration.

I would put the estimate a bit higher at 400-600 with a few considerations.

Don