Ditto what Zodiac said. This is impossible to come by. You owe it to yourself to have it milled, and then sell it a bit at a time, or keep it for yourself.
You will be robbed by a mill if you sell it in log form. If they've been in a barn and dry, chances are that they're pretty solid, and good wood the whole way through.
You need to do some serious research here if you're trying to figure out the most valuable way to cut it.
Don't be hasty about making decisions. Sell something else first if you're needing cash.
There is a place in my area (30 mins from me) that specializes in reclaimed wood, Mountain Lumber Co. It was featured in Mother Earth News, recently,I believe, and will give you an idea of what cuts are worth the most, etc. .
http://www.mountainlumber.com/
It is very important to note that when you're researching what the logs are worth, that the prices you find are RETAIL, not wholesale. Most professional woodworkers (those that do it for a living, and only woodworking) are used to paying significantly lower prices than what you might find on the internet, unless you REALLY REALLY need it right then for a particular project. You're not going to get $30/bf for everything, and probably for very little of what you have. That said, you're still potentially going to make a LOT on the logs if you're smart about it. You may end up having to spend $1000 or more on having it milled, dried, and storing it correctly---any wood, even that which has been in log form in a barn for 50 years or more is going to be at the very least a little wet inside. You're going to need to have it kiln dried if you want to sell it for a lot--non kilndried lumber isn't worth nearly as much if your'e trying to sell a lot of it--nobody wants to have a bunch of boards twist & warp when they get them in their shop. I wouldn't expect to sell it quickly, especially in this economy, unless you need to. It might take you years, but it'll be worth it.
Make sure you do your homework on this one, and by all means, keep us all posted.
Edit; I looked at the ACF website, Mountain lumber is listed on their links, and you should really also check out:
http://www.longleaflumber.com/index.cfm