I've run/owned NH mower conditioners (I'm not knocking them) but after buying and using a Hesston 1091, I'd never go back to a NH. IMHO I find the Hesston does a great job and when it does need repairs is much easyier to work on. If I was going to buy a used mower conditioner I would look for a Hesston 1091 or newer (also a CIH model, Hesston made them as well, before CIH and NH were bought by Fait). And regardless of brand, if the rollers are shot, the machine is done as a conditioner, it just becomes a heavy sicklebar mower.