I don't know how much people are willing to pay but i just saw one on TX Gun trader for $2,500. That's with just the original mag it came with.
I have been seeing a lot of them on there at prices like that but not seeing any "SOLD" announcements by them. You can ask any price but it doesn't mean someone will pay it. I guess the old saying "There is one born every minute" does hold true but I certainly would not pay anywhere near that much. I do think that there are a lot of dummies out there willing to pay $1300-$1400