Where's the cheapest place to get these?

Tokyo Toy Show (June 20-21)
- Legends (Leader) Armada Megatron (minor redeco) (8100 yen)
- Legends (Deluxe) Car Robots Black Convoy (black redeco Optimus) (3780 yen)
(Premium Collectables have 'em on pre-order for $90 & $50, respectively)