I sold my 2016 75 RWD (refresh/ap1/sunroof/tan interior) w/ 90K miles a couple months ago for $42,500 (included the 20" model X slipstreams)
https://teslamotorsclub.com/tmc/threads/2016-5-model-s-75-white-tan-ap1-mcu2-90k-miles-free-supercharging-premium-internet-upstate-sc.236461/#post-5907644