Just Kre-O introductory sale prices... or at least, one introductory sale price.
Big Optimus - $100 (save $29)
Big Bumblebee - $60 (no saving)
Sideswipe - $50 (no saving)
Small Optimus or Bumblebee - $15 (no saving)
These prices may be at regular Toyworlds as well, but no guarantees.
(Mr Toys is a group of 24 Toyworlds in SE Qld that have their own sales)
