Picking out one feature that they haven't ruined is poor consolation. As the other commenter notes Amazon has let you break down into price tiers for years. Most sites I shop at can do this.
eBay search results are better than Amazon however - but that is because Amazon's has become so awful.
A lot of people want to shop price first then see how much cost would increase by buying from someone already on the same continent.
Including shipping when sorting by price is the opposite of user-hostile and they've done this since forever, most online retailers don't do this.
I would be surprised if it's a lot that prefer default inclusion of international. They made the change right about the same time they made customs fees for international automatic and unavoidable. Makes me suspect that fee is including a hidden profit element in this dark pattern.
Including shipping when sorting by price
On a completely different note: the internet of commerce things has always felt like some sick mashup EvE Online and game of thrones. Not only is scamming and awful behavior allowed, it is encouraged by the way rules are enforced. The net is dark and full of terrors
Tickets are a great example. I've done thousands of ticket buys and sales alike on eBay since the 1990s. But now, eBay actually sabotages ticket searches by polluting every event with hundreds of fake "classified ads" for StubHub (which they own) so that people give up and go to StubHub instead, more than tripling their cut (at the same price point). And you can't exclude those shell ads, which don't even represent actual tickets, from your searches anymore.
And the fraud problem is very real.