I inherited a 2005 48" Exmark zero-turn mower. It has a 19 HP Kaw. motor. Mulching kit and only 30 hours on it. It was prchased for $6600.00 including the mulching kit, in April of 2005. I already have 4 mowers and really don't need it, so I may be looking to sell it. Please advise. Thanks.