Dear Thanasit,
The price of printhead is firm. We cannot offer any discounts. If you choose to buy from another vendor that is your choice but understand if this causes any sort of problem you are responsible. We could not determine the amount of prints because the print engine was replaced. This resets the printhead counter. Typically the printhead will last 1-3 years depending on usage and maintenance. Please proceed with the bill and customer care can get your printer back in route to you.
Thank you,