I get bombarded via my email with their special sales every time I turn around. However, I only looked at the pricing of the 703's and the 704c. It was showing available no more than a week ago. My guess is that Adorama is limiting quantities they use for these flash sales. Of course, I could be wrong.
Either way, the 703's at $600 a set is no doubt a steal. Will watch it a bit closer and see what happens. Honestly, I have been so tempted myself. It is not every day you find deals like that. However, if the 703's/704c are never hardly in stock, then what good is their sale? Such interesting times.
Cheers,
Phil