I was just wasting some time in town and found that TK Maxx are selling UFC figures for £4.99. I promptly bought Chuck Liddell and Forrest Griffin for my son. I then realised they are for ages 8+ and he's only 1, so they're now mine!
My branch seems to be selling the first and third series figures at least. These are around £10 minimum on ebay still, so a good deal if you like this kind of thing.