United States
Unlocked iPhone 5 Price: $649
(16GB), $749 (32GB) and $849 (64GB).
With a two-year contract, iphone 5
Price: $199 (16GB), $299 (32GB) and $399 (64GB).
Canada
iPhone 5 Price: C$699 (16GB), C$799 (32GB)
and C$899 (64GB).
United Kingdom
iPhone 5 Price: £529 (16GB), £599 (32GB)
and £699 (64GB).

在iphone5price.com上看到的，非合约机价格超贵。
两年合约的机子，价格很便宜，基本上都是这样。
从上往下依次是米国、加国和英国，好像就米国给出合约机的价格