Thanks for all of your replies, your information is greatly appreciated.
I have also been approached to buy a 2006 Grasshopper 722D 61" deck with only 100 hours on it. This mower is in great shape, and was used by a home owner on a 1 acre lot. It comes with a snow blade and a vacuum system. I can get in this mower for $2000 cheaper than the New Scag and $3000 cheaper than the New 325D, but no warranty. I am looking to put 300-400 hours a year on it. I know ultimately it is my decision, but any advice on if any of you think that it would a better investment than the 2 new mowers, or if you believe that the new warranty and new mower is worth the extra money?