I have this unit for sale. It is a commercial unit. I bought it used as well. It has 3,811 hours on it but I am using this machine as well. Tires are new this spring, replaced the battery, new relay switches to the wing decks. Over all the mower is good condition for the hours and the age. I beleive this model is a 1998. Three days out of the week this mower is running. No known probelms, engine is strong. I have two other 455-D's but I would like to sell this unit and upgrade to a newer but used unit. Pictures can be provided upon request. Thank you.