I believe its between €30 - €50, this would depend on the hours - but as you said it is for a 9 hour day, location (Dublin & other cities would tend to be dearer) would also depend on how many other children are being cared for (including the CM own), does the childminder provide food, what kind of setup does the CM have - i.e. a good, well equipped play area, a buggy for going out etc. As regards pay, check is the childminder flexible and willing to try and coordinate Holidays with you. IF the CM is above board, paying PRSI, USC, tax etc I think it is only fair to pay for Bank Holidays, Christmas etc.
Do your Homework, there are some great childminders around but the sector is largely unregulated.