This is my PSA for those of you with lots of non refundable OBC thinking you can get an Apple something ... probably you shouldn't, especially if it's old stock. (If you do, be sure to open it up and check it out before you disembark so you can return it if it's a dud!)
I am just off Summit, had a lot of OBC thanks to Best Offer Guarantee, so bought a (2019) 16 inch MacBook Pro for $2199 (saved $200 with their "sale.") Reading up here on CC, I saw if available, Apple stock was mostly older products being sold, and also saw riredsox's Feb post of the drained battery on a MacBook Pro purchased on Constellation. Sure enough, the one I got refused to turn on and refused to charge. After some online research, I figured the battery can be replaced for $200 which is less than what tax would have been if I bought it at an Apple Store at home.
I took it into an Apple Store today and turns out it's not a simple battery replacement; after some manipulation in the store trying to reset it, it was determined it was utterly dead. Seems the drained battery was out so long that internal damage occurred, and it now needs to be repaired ... for $678. The person helping me thought I was a huge dummy to spend that much money on an older MacBook Pro when the newer/2022 MacBook Pro with a better chip was only $300 more than what I paid; my dummy status changed only a little when I told her Apple Store doesn't take OBC.
Also, I learned that the one year warranty for Apple products bought onboard works this way: the clock starts when Celebrity buys it from Apple. This MacBook Pro was purchased from Apple Jan 2020, so its warranty expired Jan 2021, regardless of that fact that Celebrity is an "authorized reseller." So my Celebrity receipt stating "Manufacture warranty valid one year from date of purchase" is erroneous, since this applies only to Celebrity's date of purchase, not my date, and the link for more info on that receipt gives specific details only for products purchased from an Apple Store, not an authorized reseller.
Hope this helps those of you with NR OBC trying to decide between specialty dining, excursions, spa or MacBook Pro ...