I would think someone could make a killing buying cheap XP1600 and 1800s, unlocking them and selling them online. Since AMD has publically stated they are not against overclocking, I see no legal reasons this would not be ok, just as long as you inform your customers the 1 year warranty would be void and stress they need a good CPU fan. With like $10 worth of material, you could unlock 100's of XPs and then sell then for $20 over cost plus shipping. You'd be making $100+ an hour once established. 5 minutes to unlock, 5 minutes to test it, then rewrap the sucker and ship it off. I for one would pay $20 more for an XP1800 that was unlocked by someone who knew what they were doing since I do not want to risk messing one up trying it myself. I have a hard time gift wrapping things or even coloring within the lines, so tapeing up an XP and performing micro-surgery on one is not something I would personally attempt.