Yeah they do seem very expensive for what you get, probably double what you would pay for the equivalent in weights. You could probably make your own, but I have shopped around and found some decent 20-50's for around £50. I am a student, so I will need to save for a couple of months before I buy one!
I am suprised I have not yet seen one at any of the gyms I have been too.
I am suprised I have not yet seen one at any of the gyms I have been too.