My Karcher K2 Horizontal has self priming (It can suck water from bucket of water) and I paid 6k for it. I think most of pressure washers are also self priming.
One of friend bought Resqtech pressure washer recently. First he had ordered from Amazon but it came damaged in the bottom part and seller had no stock in Amazon so he had to return it. Later he bought the same product directly from Resqtech website and it was delivered in 3-4 days. Fortunately Ii came intact but the gun had slight water leakage and due that machine was pulsing when not in use. My friend contacted the seller and they promptly sent a replacement gun. Machine is working fine now but quality is average and durability is doubtful. After sales service is very good otherwise I wouldn't suggest it.
Starq, JPT, PROFFIX, Neptune, RTC, Eastman and etc are all local reseller brands and they import machines from China and stick their labels. Machines are good and should be durable but they all are generic. You can search pressure washers in Aliexpress or Alibaba and you'll find exact machines with no label/brand (
Here is one of such). They cost Rs. 2-3K in China where as here they are being sold for more then double! Of course individually buyers have to pay shipping cost and customs duty if bought from China but resellers buy in bulk so it will be much cheaper for them. Same goes for the accessories and availability is very limited if not none.