We bought a nice 68 with the farm 45 years ago. Wore that out then went to a 310. Wore that out and got a low usage 273. Time to replace that now. Looking at a couple of one owner machines . A 310 and a 315. Neither has been used for the past 15 years or so. Both sheded, but have sunk in the dirt floors. The 315 is in a drier shed, so not as deep in the dirt. The owner is fairly fussy, so machine is clean and looks good. Haven't got a price from him yet, but judging by the prices on tractor house, I'm guessing 3500 to 4000. The owner of the 310 wife died in 2003 and it looks like he just quit. Baler shows very little wear, but was put away dirty and the years haven't haven't improved it. Damper shed and wheels are nearly to the axel in dirt and lots of surface rust. He wants 1800 for it. I know the 310 is basicly a slightly improved 273, but have never worked with a 315. Neither has a thrower and we bale 7 to 8000 per year and sell most for horse hay. Just looking for anyones thoughts that may have used both. thanks