Barnes & Noble through buy.com: http://www.buy.com/prod/nook-color-by-barnes-noble-wifi-ereader
has the refurbished Nook Color with a one year warranty for $135.
Use this $20 off $100 coupon: http://www.buy.com/retail/coupon.asp?prid=84039872&&
to bring it down to $115 with free shipping. Might need to create a new
buy.com account if you are not a new customer.
This is the lowest price I have seen for a refurbished Nook Color (was $119
through B&N eBay on BF).