Let's say that you made the decision to buy a carbine because they are really cool handy little rifles. You start looking for one and on some web site you find a couple and several look great and seem to be like new. You've been to 10 gun shows and haven't seen one yet. So you pick out a nice one and consider it a wise move since you've not seen one anywhere. If the ugly ones are $1000 then the $3000 for a near mint one is reasonable. You are so happy with your new toy you show it to friends who also know nothing about carbines either, they say it looks neat and how you got it for a great price. You need a sling and look on the internet and find a guy with hundreds of brand new ones for a lot of money. That was easy and the sling looks like it is new too. Then you find out that all of the parts are hallmarked and .......well, it's off to the races.
In the valley of the blind the one eyed man is king....