Mark recommends IBM Thinkpad laptops because they are low cost, highly functional and well-supported. There is an excellent resource website for Linux
on Thinkpads at Thinkwiki.org.
ROSCo members who use Thinkpads include Mark Stosberg, Kurt Ritchie, and Matt Woida.
The models we use come from the product range of T20,T21,T22 and T23. This were found on E-bay for around $300. Some even come with pre-installed. I would look at these first not only for the convenience, but also because the laptops with Linux pre-installed tend to sell for a little less on E-bay. Mark and Hopi found that no one else even bid on their $300 Linux laptops!
These models may not come with built-in wireless capabilities, so you may want to supplement it with a wireless card we recommend