I just sold my Porsche Boxster, and ran across all sorts of weirdness in the used cars market. KBB and Edmunds for example were literally half the price of what I sold my car to Carmax. (KBB was about $7000, sold for $11K, later found it sold in private market for $20K). Used prices are messed up right now.
Having noted that, my research says that the best you can do in terms of actual market value is ebaymotors, for cars that sold via auction. That's real world people bidding real money, not guesswork.
Here's an eBay search for
sold Model 3s:
That's the best you can do today I think. Only a couple of older Performance versions sold. You can follow this search if you aren't in a rush. My mostly uninformed take is that I'd say getting $60K will be a stretch, but not impossible. It just requires the right person to find it. If you aren't in a rush, it doesn't hurt to list it 'too high'- if no one is interested, you won't get any hits.