Once again, these cards are only two weeks old and have been mining for less than a week so they are practically new.
Used is used doesn't matter if you opened it but never used it or if its been running for 2 months. Any item you purchase will always lose value the moment it is used. Plus buying through a company will allow you to return if something is wrong. If you buy on here sales are final. I believe 185 is an acceptable but not optimal price for new. If you can sell these for 185 all the power to you but expect them to sit for awhile at that price.
Care to link us where you picked these up for 145?
The deal has long since expired but here is the link. http://www.ncixus.com/products/60714/11162-15-20G/SAPPHIRE/
It was all over the mining forums when it was available though.