Not sure if this has been posted or not. If so, mods feel free to lock or delete. Found wave one of the rc cars at a kmart in Hershey, PA. The case ratio seems to be three Bees and one Knockout. Kmart has them priced at $20.99.
Sorry, I know those have been posted a while ago I'll try and find the thread for confirmation here in a bit. Edit: Here we are http://www.tfw2005.com/boards/transformers-news-rumors/618640-rc-transforming-prime-cars-kmart.html