Newegg has an internal promotion going on right now, offering various small electronics for $0.99 after rebate. Some things were pretty cheap already, but at $0.99 you can afford to stock up on a few in case the ones you’re using now break.
The items include a 2 gigabit ethernet adapter, Bluetooth dongle, USB 2.0 802.11b/g WiFi adapter, PCI Wireless Adapter, powered wireless antenna, 100Mbps ethernet switch, USB and Firewire hard drive enclosure, and a notebook wireless card. We can find a use for pretty much all these things around our house.
Promotion Page [Newegg]