Is there a trade in value for 2016 iPad Pro with a 9.7-inch screen

I've had this ipad for a while but barely have used it. I would like to now (I'm a teacher). I realize this is old, but, is there any trade in value for this? I've been trying to find a replacement pen for emergencies and I find conflicting Amazon sales of pencils that say for model A16 but for years 2018-2025. Mine is model A1673. Should I just give up (works perfectly fine) and just get a newer model? Hence the question about trade-in value. Thank you.