OZStock - USB 2.0 DVB-T HDTV TV Stick - $24.80 + Shipping Or Pick up + Buckscoop Cashback.
also, the quality/sensitivity of the tuner makes a big difference if you live in a marginal signal area... Ozstock has a 14 day money back guarantee on these, so if you try one out and can't get a decent picture, you can always return it...
note: Windows XP/Vista support only...
Microsoft Windows Vista / XP
P3 600MHz CPU or above for SDTV
P4 2.0GHz CPU or above for HDTV
128M Ram or above for SDTV
256M Ram or above for HDTV
VGA Card with at least 32MB Memory for SDTV
VGA Card with at least 64MB Memory for HDTV
Sound Card or On Board Sound Chip
One Free USB 2.0 Port (Not compatible with USB1.1)
Microsoft Direct X 9.0 or above
Microsoft Media Player 9.0 or above
UHF/VHF Antenna for DVB-T Terrestrial