I once ordered a used attachment for my tractor, and 2 weeks later, I had to buy a new Disk Harrow. I wanted to save money, but I screwed up. Since then, I have decided that I will only buy new equipment. I found out from a farmer the contacts of a company that sells tractor attachments: https://www.machinerydealer.co.uk . Now I order all details that I need only in this store. I'm not discouraging you from buying used attachments, but you shouldn’t forget that unpleasant situations can happen if you’ll buy them.