I was quoted for a Super Duty demo 48" deck 23 Kawasaki engine with 40 hours at $5200. Looks like it is in about 9-9.5 out of 10 shape. New Fastrack Hustler 48" deck 19 hp kawasaki engine for $4800.00. Does this sound fair or should I put the clamps on them further? Thank you for the advice in advance.