I need the original prices to the iPhone that have been on the market?

I'm doing research on iPhones and I need the starting prices of each of the iPhones, including the different GB models of each phone.
iPhone 2g iPhone 3g iPhone 3gs iPhone 4 iPhone 4s iPhone 5 iPhone 5c iPhone 5s iPhone 6 iPhone 6s iPhone 6s plus and the iPhone 7 if the prices and GB models are available.

http://aaplinvestors.net/stats/iphone/pricing/

Basically all the iPhones (on their own, no contract) have been $649, 749, 849 depending on how many models of each were available.

The 1st iPhones sold for $499 (4GB), $599 (8GB), they were sold differently vs the 3G through the 6s/6s Plus which were sold (on carriers) through 2 year contracts.

Remains to be seen how the iPhone 7/7 Plus will be priced through carriers since most of them (Sprint did as well but since reverted) dropped the 2 year contract option & now are doing so through instalment plans.

The Plus models start at $100 more, so $749, 849, 949.