We have all heard a dealer say "this mower has only been used as a demo". What would be your criteria for buying a demo mower? Pro - If it's a legit dealer, then you know that you will get a full manufacturer warranty. Hopefully you will get dealer priority when/if it needs fixed. Con - 50 hours on a demo "might" be more like 75 to 100 hours of wear and tear. Keep in mind that we have read stories where people admit that they beat the sh_t out of it while they tried it out. For the record, I have purchased mowers in the past that were used as demos. The price was at a reasonable discount based on the perceived use/abuse that I could see. I try to stay away from "loaner" machines. They usually have more hours on them and have been run second tier employees. Could be lots of unseen abuse.