off the top of my head, the set of 10 1/8oz is £43.00 and the 1/2oz individual oneas are £12.50. i'm not good on the prices so i may be a few pence off. if you call the office on 01204 412001, they will sor it out for you
Don't forget that Creative do the 'Mosaic' and 'Metro' powders that are great for this sort of thing!
They come with instructions, and a level scooper, so that you can mix the colours to make your own, which is perfect. They also sell minature pots, so that when you have made up a colour you can store it separatley. And they have a wide range of glitter, which you can add to the acrylic. (It is suggested 2 parts powder- 1 Part glitter)
Now I am not exactly sure of the prices. I think they are between £30-£40. But I'm sure somebody can correct me, and the glitter and pots are just a few pounds.