Isn't $50 what most of them run today?
Yes, I think most of the budget tablets are sold for $50 or less at Amazon, Walmart, and eBay. There are some that are $37, but they are not as good according to Unbox Therapy who runs a Tech Channel on YouTube.
I bet, both the $50 and $37 tablet, are made by the same factory since both cases look pretty similar, and has almost the same specs like a quad-core CPU, 512MB of RAM, 8GB storage, MicroSD memory card slot, and Google Android 4.4 KitKat.
But, the guy reviewing the $37 tablet, was using the tablet in a brighter room, so there was more reflection problems which made his experience worse because of the bright lights in his room.