That would explain it. Oddly enough, I get broken/end of life laptops from friends / garage sales etc, and almost all of them have Socket M processors (Core Solo or Core Dual) - I suppose they are are about the right vintage to be appearing in numbers on the market right now. They usually have 1.6 or 1.7GHz processors.
Great tip about the US vs the UK site. Not only are there more CPU's in the US, they're cheaper too!
International postage is not too bad for such a small item - I just ordered a T7200 from California:
Ebay Item No: 141132261735
He's got 40+ left @ $15 each. Which is pretty darn good. We'll see how long it takes to get here. Usually it's less than a week, unless the Customs get hold of it. :o(
My only concern is the temperature. The T2250 routinely runs at 60deg (as reported by CPUID HWMonitor), which is too high. I suspect that this is down to me using the cheap thermal paste I use for desktop builds - it's fine for 775 processors, but not for mobiles. I've got some (horribly expensive) Zalman silver paste on order, so it will be an interesting experiment too see what difference that makes. An essential if I'm going to fit a T7200, methinks.