Experience purchasing a used high-end cartridge

I am contemplating purchase of a used high-end cartridge with reportedly low hours. I found a thread from 2013 about this topic and am wondering if advances in online marketplaces have improved the experience or lowered the risk. I would like to hear from those who have purchased a used cartridge through Audiogon, US Audio Mart, or eBay within the last year. What was your experience? Would you do it again? Did you ever attempt to return the purchase and if so why and what happened? Listing of the seller would be greatly appreciated if willing to share.