B&H Photo Video has a great bundle for those looking to do two-light flash setups: they have two Speedlite 600EX-RT and a Speedlite Transmitter ST-E3-RT for $1079.95.
Click here to check out the deal at B&H Photo Video.
The Speedlite 600EX-RT is already discounted to $449 but this bundle further discounts it. The ST-E3-RT regularly goes for $282.74, so your savings with this bundle is $100, or $200 if you compare to the regular $499 600EX-RT price.