£99 includes a DVB-T card and a remote control. The software alone costs £50.
I've found that the software that comes with cards are OK for watching TV, but fall down when you start trying to do something like timeshift or record. Check out the free stuff and if it works, you've saved just under half a lesson
(I've been keeping up with your thread in Private Flying).
If you're really up for a challenge, there's always mythTV. Thats free...as in speech.