The vehicle was first purchased/registered in 04/17/2017 therefore maybe why no power liftgate. Prices you indicated are for trade-ins right? I assume retail selling prices should be (a lot) higher.
The prices which I quoted were for people like Carvana or KBB dealers buying my car. That's likely what you mean when you say "trade in", but even some of these sources will potentially give you a little higher value if you are truly doing a trade-in through them, so they get some profit on vehicle sale to you, versus my case where I sold it outright.
To illustrate the drop over the latter part of 2023, my first Carvana quote on 10/21/23 was $25,700 (+1,799 if trade-in, not straight purchase from me). By Nov 7, 23 Carvana offer dropped to $24,400, and by end of the year was $20,600. The on-line instant offer via KBB around year end was a little lower, but I had 3 KBB dealers contact me about my car, and ultimately sold to one of them for $21k after some negotiating. I know originally that dealer immediately put my car up for sale at around $26k, but I believe they decided after a few days to sell it via auction, so not sure what they ultimately got out of it. I've not tracked what prices have done in the past 3 weeks since I ended up selling my car.
Regarding the power lift gate, it was part of a premium interior package. My original sales paperwork just lists the package, doesn't detail all it included. I did a quick search and here is reference from on on-line article via Consumer reports from when the first "facelift" was announced in April 2016.
"A new Premium Upgrade Package ($3,000) bundles the HEPA air filter system, LED turn signals, LED fog lights, power liftgate, Nappa leather armrests, LED ambient interior light, and lighted door handles."
So you if you can access the car, you may want to check on a few of those items. I think the biggies which might be of importance to you is are the power liftgate, fog lamps, and HEPA filter, but those are all personal preferences. Would seem the original owner didn't view them worth the $3k which I believe was still the price for the package in early 2017 (that's what my June 2016 sales docs show).
Good luck with your decision. It was a tough decision for me to replace my 2016 MS90D for a new 2023 MS LR, but the Tesla offer to transfer my free supercharger to new car in Q4 2023 tipped me over the edge (yeah, I realize that's more emotional that probably hard financial value of free supercharging, but I'm not always 100% perfectly logical in all my life choices!).
