Hi Keane and welcome to the Lincoln Forums. Not sure if any other members will feel more confident to offer an answer on this.
However, in my opinion, there is far too little information provided to give any sort of accurate answer to the "Should I buy" question.
Just for starters, there is no price provided? All options and equipment? Condition of vehicle, tires, prior vehicle history...etc. etc. etc.?
In addition, "...complementary 2 yrs maintenance..." is a vague term, and the required maintenance on a relatively new Lincoln vehicle with that mileage consists of not much more than oil changes and tire rotations.
Take a look at the Maintenance Schedule in the Owners Manual. Perhaps engine air filter and interior cabin air filter. Maybe two sets of wipers in tow years? Probably would not even need brakes, unless you put on a lot of miles in two years. And that all depends on what the "complementary maintenance plan" they offer you includes. So you should ask for that in writing.
You can download the Owners Manual here:
https://www.fleet.ford.com/parts-service/resources/owner-manuals/
I am sure others will jump in with more advice, so keep us updated and good luck.