Mazda 6 GG Abs hydraulic pump motor defective ?

Hello. My girlfriend has a bit of worries with her car at the moment. She bought the vehicle a year ago privately, apparently with an expensive defect. She never noticed that the ABS people never burn (whether ignition on or engine on). Now she had to go to the workshop because of another repair and of course errors were read out (see picture). According to the workshop this pump has to be replaced. Estimate of the workshop 1300 € only for the pump. experience with such a defect? Can’t you buy a used pump and then install it? Vehicle data: Mazda 6 Type GG 1.8 Petrol 120 HP 120 tkm Thank you for your help…