What happens if i don't pay import charges for an iphone from america on ebay?

I'm getting a second-hand iphone from ebay… Some of them say "import charges included", do i have to buy one that says that and pay for import charges? Or can i get one without the import charges?

I've bought stuff like that from America without paying any import charges and without the listing saying "import charges included and it's never caused me any problems.

I don't know, maybe some of the listings just claim to have import charges included to make them more lucrative to buyers.