Did I make a huge mistake?

I just bought a snoo off of Facebook marketplace for $650. The listing looked clean and it was boxed in the original box and ready to go by the original owner. I was so excited to see a snoo that seemed to be in pristine condition by one owner that I did not ask the year the snoo was manufactured… 2015-2016 on the booklet now that I have it home and plugged up🥲 I’ve plugged it in and downloaded the app and everything works as intended but I am feeling like I made a major mistake not asking the year before purchasing. Do I try to re-list it and buy one on cyber discount or hope it works through as intended?