The French Knoppix site, http://knoppixfr.tuxfamily.org/, has translated their hardware database into english: http://knoppixfr.tuxfamily.org/index.php?page=hardware There are not a lot of listings yet, and the site surely doesn't reflect the large amount of hardware that works under knoppix, but hopefully it will grow.
$8.00
Knoppix Live GNU Linux System 9.1 on Bootable CD / DVD / USB Flash Drive
$9.99
KNOPPIX 9.1 LINUX INSTALL & LIVE DVD
$9.99
Linux Knoppix 4.0.2 Installation Disc
$29.99
Knoppix Linux Bootable OS v8.6 "Original Live Operating System" 32G USB Stick
$20.30
$8.00
Acer Aspire One 9 inch Netbook ZG5 512MB RAM 8GB SSD HD Knoppix Linux WiFi VGA
$79.99
Knoppix 3.4 Linux installation CD
$10.00
Knoppix Linux Bootable OS v8.6 "Original Live Operating System" 16G USB Stick
$19.95