Thanks for your replies. I've gotten the floor back from the mill and it looks pretty good. I partially agree with Russell, sure the wood doesn't have 200 years worth of varnish, oil, lacquer and I don't know what layered on it. But you can still see all the old nail holes and iron stains, small bug holes (and some larger ones) and it is virtually knot free.
But what I personally like about the old wood v.s. new pine is the color. It doesn't have any finish on it yet but the hue is a nice warm brown color, not bright yellow like the new stuff. Also, the grain is very tight! I'll post a picture when the floors are done.
Unfortunately the mill overestimated the amount of wood we'd get back and we have just enough to do the building and that's it.
Thanks for y'alls advice on selling it. I'll keep it in mind for next time.