Thank you everyone for the suggestions. Dan/JJ have posted deals on various printers in this Brother line quiet often. I'm going to wait until the next time they post one and I'll order it. For now, I signed up for the HP Instant Ink subscription, which includes two months of free ink. Hopefully the next deal will come sooner than that. (Effective cost- $45 for two months of printing, up to 300 full color pages each month, 5 cents for every page over the 300.)
I'm still perplexed about a few things:
-The actual printer model isn't listed on Walmart's website, even though I bought the printer at Walmart.
-The printer model shows no results when searched on HP's website, nor on Amazon.
-The ink model shows no results when searched on HP's website, nor on Amazon or Walmart.
Each of these points, in their own right, are very peculiar.