I have a few. All have various purposes and get used regularly, except for the first two on the list.
I'll start, oldest to newest, listing only the functioning machines.
Librex 386SX notebook. 20 MHz i386-SX, 3 MB RAM, 120 MB HDD, monochrome LCD display, 1.44 MB 3.5" floppy.
Compaq LTE Lite 4/25c notebook. 25 MHz i486SL, 12 MB RAM, 250 MB HDD, 16 shades of gray LCD display, integrated trackball mouse, 1.44 MB 3.5" floppy, 14.4 Kbps modem.
IBM ThinkPad T41 notebook.
Dell Latitude D610 notebook.
Dell Inspiron 1520 notebook.
Lenovo ThinkPad T60 notebook.
Lenovo ThinkPad T61p notebook.
Custom desktop. i7-2600K, 8GB RAM, 4 TB HDDs, 22" WSXGA+ TFT LCD display, GeForce GTX 480, other stuff.
I'm thinking about a new laptop, but the "need" hasn't arisen yet.