Did you test code? There maybe a vudu glitch with the extended code for part 1. about 2 months ago vudu sent out an email saying this movie was no longer lisenced with vudu and was removing it from your library unless you emailed support within 3 days. since then A few people online have posted they have had problems redeeming the extended version. But some people got it to work still. I would suggest to be safe, whomever, maybe try redeeming on flixster first to prevent vudu from messing up the code. I don't know if vudu fixed the glitch yet.
neither do too well, except when you get lucky, real lucky due to how long they've been out and that every walmart has sh1t tons of copies for cheap, but that twilight forever with all the movies on it still fetches a good profit and widens your market base a lot larger.