You can purchase the last two Twilight Movies for Amazon Instant Video of $.99 each. (Yes, it is the WHOLE movie – not just a rental.)
Earlier, all four movies were $.99 each, but now only the last two are available – so I’m not sure if that means they are changing every couple of hours or once they hit a certain limit. Either way – act fast.
Pricing was current when the post was published, however Amazon prices change often, so please check before you buy.