Mid 60's. (FSD, MCU2, under 13k miles, 1 owner, garage kept day/night, mint, 21" arachnids etc) If I would have opted to drag it out, quite sure I could have gotten at least a couple thousand more. Maybe. (Especially With the recent $5k price bump overnight for new LR's? Im guessing that will have positive upward impact to current used model S Sellers as well.)
Or..I could have spent the next 6 weeks spending time each day fielding more offers that were lower than what I received until I (hopefully) got a higher offer than what I accepted.
Thats the thing about the used market...not always black and white. But in the end, I'm satisfied. I sold for significantly higher than trade in, and the buyer spent less than he/she would at a dealership/lot/carmax/etc. Win/Win for both parties.