This is my first season in business, and as I am getting more properties, I am looking to upgrade to a good 36" walk behind. Unfortunately, I'm 'just a kid' with little money. Does anyone know of or will be selling a good, reliable machine for a good price? (I'm talking $500-800 max.) I'm willing to drive a few states away for a deal. My 21" Lawnboy that I got for free next to someone's garbage can isnt going to last forever. Any help is greatly appreciated.