A new Apple product would usually include complementary limited warranty
and offer a longer term extended plan for additional cost. ~ Not sure what's
happening, if yours was an 'online order' or 'contact-free' pickup from a store?
The MacBook Pro 13-inch 2019 model would likely have the better design
"butterfly keyboard" that had been upgraded to better technology. (A new
'magic keyboard' was upgrade for 2020 model.)
An 'authorized Apple reseller' such as BestBuy could offer their own warranty.
The product may have been purchased at retail -and not used- then returned.
So if this path occurred, the unit may not qualify as 'new' to AppleCare. You
may have to ask of BestBuy, what's happened with that purchase. ~ As 'non-
Apple' source, other re-sellers don't necessarily play by same rules.
• Find information about your warranty or AppleCare plan - Apple Support
https://support.apple.com/en-us/HT202741
• If you don't see your AppleCare plan on My Support - Apple Support
https://support.apple.com/en-us/HT202695
Last-year models usually have lower prices in traditional 'holiday sale' times.
..Not sure what Best Buy could do ~ nor how that affects your choices there..
Most participants here are users like you; we volunteer (as peer-to-peer
helpers) and, are not compensated; nor representative of Apple, Inc.
Good luck & happy computing!
🌞🌿⛵️🌤🎣🤖🏕🐝⛄️🌻