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
Actually, they give search results preference to items with "free shipping" (their so-called "Fast and Free" cobrand) regardless of final price to the consumer.