Both Target and Toywold have the first two Movie Blasters (Optimus and Starscream) on sale for $20 each (down from $40 or $60, depending on the store).

Better still, the Target one is the Optimus Blaster WITH the bonus FAB Optimus figure. If you can actually find one of these at a Target (I've only seen it twice), you are getting a $60 Blaster and a $30 FAB for the price of $20!!!

Target sale is on from Thurs 19th June to Wed 25th June.
Toyworld sale is on until 3rd July.