1.Observe whether the machine's print head is used or not, the difference between the used and the new can be easily distinguished by our eyes.
2.Check ink tube, ink road, whether there is ink in the print head, if yes, that means the machine has been used.
3.Open the pedestal of the print head, observe the internal parts, in general there will be date code on the parts, if there is a great difference of the date between different parts, indicating that the machine has been used for some time, in which the pars has been replaced.