About as low as they go is 8€ shipping included. I bought about 100 for that price so far. But it takes time because like i said, shenanigans. If it allowed me to set price + shipping at 8€ and show me results, it would take 5 seconds. And if there were no results, sure, you set it at 9€, 10€ and so on. What i am trying to say is that if you have a price in your head, its gonna take a very long time to find item at that price. It shouldn't be this way. Its been a long time since i used ebay but back then i remember it had an option to sort items by lowest price+shipping and back then there were no strange things like picture of a power supply but listing a price for cable only. Sadly ebay is quite a lot more expensive than aliexpress for the same chinese item.
But yes, if you dont care about price then its fast, probably the first hit. But for 20$ i can buy original power suply, in my country. One usualy uses aliexpress to get a significant discount.