A thanks to Flux for posting this on the 7 Forum.... looks like a good deal!
For folks currently with Verizon or thinking of porting-in to Verizon and purchasing the iPhone 7/7+ on the device payment program, there's a pretty good trade-in starting for 5, 5c, 5s, 6, 6s iPhone users that are willing to trade-in a good working condition phone.
Trade-in of 6, 6s (all variants) gives you up to $650 trade-in value split into 24 credits (basically offsetting the cost of an iPhone 7 32GB)
Trade-in of 5, 5c, 5s, SE is a $400 trade-in value split into 24 credits (lowering the monthly payments of an iPhone 7 32gb to $10.41).
There's further discussion on the Verizon reddit sub-forums or VZW CS open for pre-orders.