Pentium M cheap? Sorry dude but that is not going to happen.
I just spent a whole week trying to get one for my syster-in-law and couldn't find anything in her price range.
Heck! I even tried eBay and I cannot understand why people would buy used laptops and pay as much as a brand new one? That puzzles me.
Best thing is too look around (brand new one) and see who charges the least ammoun of money for one. Whether it's Dell, Gateway, HP, Acer, Toshiba and Sony.