Choro-Q pullback Batmobile toys

I found these toys at my first ever comic convention. I didn't think much of them since the vendor was selling them at $3 apiece. It wasn't until a day later I found out that they were released solely in Japan and that international buyers pay an average of 8 times that on average for these little guys. This particular packaging came off the top of metal containers of coffee. Others are on small cards similar to a toy in a store. I'm hoping to someday find a few more. I'm honestly lucky to have found any.