I looooooovvvveeee Dr. Who!!! I've watched it since I was a kid, with Jon Pertwee in the title role. Tom Baker is still my favourite, though David Tennant and especially Chris Eccleston have been excellent. Not AS fond of Matt Smith, but I think some of that has to do with some pretty crap storylines. What I will say in his favour is that I can see different elements of all the previous Doctors in his character, which is good.
As for episodes, I have every one (barring the recently re-discovered missing ones) on Div-X, right up to the most recent series. I love spending an evening watching the classic series, or maybe an episode or two from the new.
I sent copies of the 2 films, starring Peter Cushing, to Australia not so long ago, to a fellow fan who couldn't get them out there. It cost the whopping sum of £3.82