Walmart would not still be in business if they were scammers. However, they will sell previous models at a discount.
My kids bought an Apple TV for me a few yeas ago from them. It turned out to be a previous version with fewer features than the model that would have been current. That was not a scam because Walmart has to clear out old stock and my kids did not research Apple TVs before shopping so did not know what was current and what was not.
I have seen similar "previous model" complaints here about WM but, again, that was something a little pre-purchase research could have prevented. If the price is tht heavily discounted, I suspicious that it is a previous version.
I've seen too many issues with Apple products bought from non-Apple outlets to recommend anything other than buying directly from Apple.