Bigpockets sells this TV Tuner for only £23.99. Note that it is an Analog tuner.
This is the business when it comes to tv tuner capture devices. It has a great philips tv tuner which supports tv broadcasts up to 158 channels.
It can capture from external devices in composite, svhs and firewire and it can even stream across the net.
So if you have access to an internet connection you can even have a wedding or other important event streamed to you across the net.
It can even encode in Mpeg1 & Mpeg2 for cd/dvd video burning. The work is all done by the xrecorder so not only does it not tie up your pc like some other methods it is also quicker and the outputted files are a lot smaller than software compression methods.
At 420g its not too heavy if you want to use it on the move and as you can see below the tv tuner supports pretty much everywhere.