When will iPhone 5s go on sale via Verizon?

2 days ago Verizon had a sale on iPhone 5s for only $99.99 but I missed it. Now it's back up to $199.99, when will it go on sale again?

Probably in august

Walmart has one of the best deals now that I've seen yet (only available in stores):
At Walmart, the iPhone 5C 16GB will cost $29, down from $49, and the iPhone 5S 16GB will cost $99, down from $149. The new prices are available with a two-year contract on AT&T, Verizon, or Sprint.