When buying pressure washer, look at the pump type/brand. I believe they're the imitation of the AR SRMW or RMW axial pumps. The good news is that they're rebuild-able but replacement pump cost about $50 shipped.
You gotta maintain it religiously to keep it for long time. search up "winterize and storage" for pressure washer. The axial pump-type doesn't allow for a lot of error like triplex pumps.