A NIB Series 70 went for $2402 on GunBroker a couple of weeks ago.
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=420930366
I paid $1250 for my blued one in 12/12
I have used them many times without issue. My recommendation is to do your due diligence and make sure the seller is reputable. I purchase NIB Colts and the amount of fake boxes, manuals, etc out there is incredible.
Very nice collection. I just purchased a NIB S&W 31-1 and a 19-4. I also purchase my first python, 1978 only factory fired. No pictures of the S&W's yet.