I think Activators are about the $17 mark and about $13.50 on sales.

Kmart has been the only place I have seen Activators, but my area is well nkwon for being badly stocked. Bumblebee is the hardest figure to find of the first wave activators, I was lucky to walk into a small town toy store while on holidays and get mine just after the store had been stocked.

Good luck.