This deal is very YMMV
I just picked up the Blue Pokemon 3DS XL at Sam's Club for $179.71. They also had the red one, but that rang up for $199. I made the employees scan them at the register.
If you are scanning you can't scan those cards they put out, the systems have to be scanned with the serial number in order to come up in the system. My Sam's club doesn't have a barcode scanner but there are definitely Sam's club's out there with them.
Not all stores have this item, I was lucky, my local store did. I also visited one store where this was no where to be found. Most Sam's club stores will only drop an item in price when there is one left at least from my experience.
These can be seen the in lockup cage, at least in my case they were, just look for the red & blue 3DS XL sized boxes. You should be able to see them from a distance.
These seem to be available on the Walmart website for $199, but they don't qualify for any current promotions apparently. Anyways they are sold out of all the stores around here, besides this one find at Sam's club.
For all I know this could be an isolated incident of these at my local store, and no one anywhere else will find one.