I guess it's cheap because the way it was meant to be run isn't exactly top notch speed (It's something like 133x14 for default on the mobile 2500+). Price is all about the rated performance, not the possible performance 😉. Don't bother getting a mobile 2600+, as I think it's too expensive (Approximately $100). Get yourself a 35w mobile 2400+. That will run you around $10 cheaper, and it does just as well as the 2600+, and from what I've seen, does it more consistently. The mobile is multiplier unlocked. I've gotten all my 2600+ and 35w 2400+ chips to run at 2.6ghz on air. Look at my sig for reference. Good luck!