I bought a used set for $50. They were new and came in their original packaging. To be honest I'm not sure why they are used. No problem putting them on. I actually had to buy new yellow hats as mine were cracked and broken by the time I took them off. Worth the money and I can already see the difference cutting the grass. It no longer slips, the deck is now level and cuts better. If you find her like me, don't be shy. Just buy them.