I saw that this week also, and now I have no idea where I'm going to find the 1:50 diecasts. Target was the only chain/store in San Diego to carry these (the single packs), and now they are gone.
It's not entirely a surprise though, Target carried the Batmobiles several years back when Mattel first introduced them, and they stopped carrying them after just the first wave, even though they sold out completely.
Guess I'll have to find them on the web at rip-off prices. *sigh*

I've seen the same BatVehicles at my local Walmarts, Meijer Stores, and even Kmart. Price varies from
6.99 to 10.99, so be alert. Clearance ones at Targets are not moving out very fast, and they pop-up in
some pretty odd places around the toy aisles.

I'm not surprised. They languished on a back endcap. I don't recall seeing an inline location for them.