ewiz has nf7-s's for 10 bucks, probably a typo but worth a try if it actually works out. The best they can do is cancel it because I don't think it's legal for them to change the price after you have already ordered it.
http://www.ewiz.com/detail.php?name=MB-NF7-S
http://www.ewiz.com/detail.php?name=MB-NF7-S