Good luck, as others have said, you do need to spend a little money to begin with. I now only use a straight and the combined cost of my favourite razor (which gets about 99% usage!) and my brush was a little under £100. I would imagine I've saved about £300 so far on cartrides though!

Have a look on ebay - there are definitely a few good deals to be found but do make sure the pictures are good enough to check the condition of the blade.

p.s. In case you're wondering, my favourite razor is a Dovo Black Star and it was worth every penny!