The B-Series isn't that hard to get hold of nowadays, mainly because those that have them won't let them go! They are probably the most ultra-portable machines available, weighing in at under 2 kg (5 lbs), are compact (25cm x 22cm x 3cm or 10" x 9" x 1.25") and have the great bonus of a touchscreen.
Although rather "old technology" nowadays, these laptops are perfect for working on office documents or surfing the web when you have a few hours "downtime" relaxing at home. Both myself and my wife us them every evening to catch up on things whilst watching TV or chatting.
Being older technology, there's not Wifi included as standard, but a simple PCMCIA wireless network card solves this. And how much easier can web surfing by than simply touching the screen with the touchscreen stylus.
All-in-all, one of the easiest to use, easiest to carry and - overall - easiest to work with laptop you're likely to find. And, to boot, they're really cost-effective because of their age. Don't forget; if you just want to surf the net, write documents (etc) and don't want to play the latest games on your laptop, you don't need the latest kit. As a side note, Windows XP works fine on them, even though they're only about 500MHz. Just goes to show how optimised they are!