Centrino is just a marketing name Intel used for Intel mobile CPU + intel chipset + Intel wireless on the same machine. So a Pentium M/Core/Core2 etc. can be Centrino chips.



Laptops are pretty easy to store. Whenever you find a mint working one remove the main battery (stored separately in a cool dry place at 80% charge if it takes a charge) and store the machine on a shelf for ten years then try Ebay.
Heck even the harder to find AMD chipped laptops might be worth something when AMD goes bankrupt in the next 5 years.