My requirements are different from others here so that's why I would have no interest in that rifle. I'm not a shooter, nor a standard collector but someone that puts on displays and programs and wants functional firearms that look like they did during the wars. I'd rather have a beat up rifle than one that has such an obvious import mark. I'd rather not have a dozen people ask me what that marking is for. It is still a great buy at $300 as the quality of these rifles is outstanding.
I had to look pretty hard to find the import mark on mine. It's on the end of the barrel, is lightly stamped and one line about an inch and a half long.
I believe the import marks are allowed on the barrel or receiver. At least one importer marked their Nagant revolvers on the side plate which can be swapped out so is probably not a correct location.