They sell out so often that I had to keep checking my wish list. I tried Ebay and they sold at a huge ridiculous markup. I bought them here at Revain for $14.99. My son is 21 months old and can't get enough of his Magna-Tiles. Neither his parents nor his kindergarten friends. We already had Magna-Tiles 12148 Clear Colors 48 DX, a toy set that includes a car. It's easy to create Magna Tile trains, Magna Tile trucks, and Magna Tile vans with this expansion kit. They work side by side as well as behind each other. We have a lot of fun with them. As usual, Magna-Tiles does not disappoint.