Just scored an SNES classic console at Gamestop this morning. I found it by googling "gamestop snes classic" then choosing Gamestop under the "Shop Now" section. That brings up the closet store and then you can click "Nearby Stores" to see which stores have it in stock. 20% of the stores in my area show in stock and another 30% show limited stock.
Hope this helps. Good luck and Happy Holidays!!!!
Link for reference:
Adding stock checker link posted by undignified1:
Use istocknow to locate the current inventory. Filter "retail only" and "hide if no stock". I'm pretty sure you can find one. Link