How much does the iPhone 4 8GB cost without contract?

Not really used to shopping for phones.

Some details that might be necessary:
- In Canada
- Unlock doesn't matter to me
- Been with current provider for almost three years (current contract is up)

If you could get the price of the unlocked version and the locked version as well it would be great.

$450 in both white and black.

An unlocked one in the US is $449. The unlocked one in Canada depends on the carrier you buy it from.