Interesting trade lol.
Each vehicle has its own problems. Since you are looking at a 2020, all the issues found in the 2014-2019 MDXs has been either addressed by TSBs or with better fixes.
To give you an understanding, my 2017 MDX with nearly 110k miles on the odo has been trouble-free for me. If anything, its mostly user caused issues, cuz I’m a young curious car enthusiast.
Since its 3 yrs old and only 16k miles, just see the maintenance history of the vehicle and try to feel the transmission. Also double check the Navi and the Android Auto/Carplay systems (these do have some threads here iicr). If the car has that horrible auto start-stop system, there is another thread discussing issues about it. Just do a thorough inspection of everything possible. Also brake fluid should be changed this year due to the 3 year /no mileage limit interval.
Sent from my iPhone using Tapatalk