Brad,
You are getting some good advice in this thread. If your carbines are the typical ones with the "FAT" marked stock that they were selling for $495 you can expect that they will now sell for $750-850 without too much issue. A collector can easily replace the "FAT" wood with a USGI set and who is to know the difference. Obviously the less common makers may bring a premium, as will condition and amount of correct parts. I am sure you have the CMP Certificates to go with the rifles, that will help you realize maximum price.
Post 'em up here, give the guys a shot. A good description and some clear pictures make all the difference.
Good luck.
"There's a race of men that don't fit in,
A race that can't stay still;
So they break the hearts of kith and kin,
And they roam the world at will." - Robert Service