When is it more cost-effective to buy a new printer instead of replacing a print head due to an E05 error?

It's often more cost-effective to buy a new printer instead of replacing a print head for an E05 error when the cost of a new print head (which can be substantial) approaches or exceeds the price of a new, entry-level or mid-range printer. This is especially true for older printers where other components might also be nearing their end of life. Consider the age of your printer, its original cost, your frequency of use, and the availability/price of a new print head before making a decision. For higher-end or specialized printers, print head replacement might still be the more economical choice.