I found a used Bob Cat 48" belt drive fixed deck mower for $500. It is an 2004 model I believe. It has an 15 HP Kaw on it. I also found a 18 HP Kohler 48" Red Hawk Hydro with sulky with 10 hours on it for $1,000. I like the thought of it being hydro and new vs. 6 years old and belt. Is it a good deal??? What would you do?