After light leak problem, Canon EOS 5D Mark III now start shipping again. At most stores online, such as Amazon, B&H Photo Video, Adorama, the 5D Mark III is still out of stock.
But if you can afford $100 more, you can get 5D Mark III right now at Digital Rev, they have 5D Mark III in stock and will shipping in 24 hours.
or wait your 5D Mark III at Amazon with $3,499.00
See full list: Canon EOS 5D Mark III In Stock Tracker