5pc set is 29.9, 4pc set is a bit cheaper, single brush range from 6.XX to 1X.XX
I can't really remember the exact price but the eyeliner brush is definately 6.XX,and foundation brush is $11.X Honestly speaking I think the price is quite reasonable. given that you need to pay shipping if buying from US.
btw there is a new 5 pc set with the same brush as the old one but with a square bamboo brush holder instead of the brush roll.