I picked up an X530, the air-cooled version of the X540, with only 288 hours on it. It needs new front tires and some TLC but runs very well. I mowed my yard with it when I got home and it is a beast on hills. My X390 is nice but this bigger tractor is a nicer fit for a big guy like me. It has a couple of dents on the rear fender that I will have to work on but the plastic crap is all good! The PO must have used it for parking lot duty because the outer lip on the edging side of the deck is worn away. I plan to weld a 5/8 inch bar around the entire edge end. It has new belts and spindles and also new blades. I bought a GX345 from a college that used big JD's for the campus and the GX for the parking lot duty and its outer edge was worn away too. The guy I bought it from, his brother works at the JD plant in Moline and just sold him an X758 for $3000! Pressure washed it when I got through mowing and I think I got more grass out from under the belt guards than I did from my lawn! It also has the mulcher installed on the 54-inch deck. It did a nice job under the trees that have started to shed. I like the new gadget where with a lever you can switch from mulch to discharge with a simple flick. Pictures later. Down boy down!