Over Expensive Centurion Systems Parts

My Centurion D5 gate motor recently had a Power Supply failure. I got quotes from more than 8 shops and the price for this Power Suppy is between R700 and R900. This is just ridiculouis people. How can a basic power supply with a few standard components ever warrrant this price. Of course there is markup or profit on from the retailer but still. This is not a computer baord but a small standard power supply/charger and as far as I can see it is made in SA. So why so expensive ? I am writing to express my deep concern and disappointment regarding a recent experience with this. I would like to request an investigation into this matter and an explanation of why centurion has such expensive replacement parts ?