Frys.com has Tile combo pack on sale for $50 and google express matched the price. Use code NEWYEAR20
to get an extra $10 off, with a total of $40+tax. The same combo sells for $60 on amazon: https://www.amazon.com/Tile-Combo...words=tile
This combo usually sells for more than the 4 pack Tile mates combo due to higher MSRP of Tile Slim.
Alternatively, you can get 4 pack Tile mates for $40 on frys.com: https://www.frys.com/product/9027507.
Backordered now but will ship in Feb. In-store pickup available as well.
These are guaranteed to last a year, which might seem a little short if purchased at its MSRP, but at $10 apiece I'd give it a try.