Um, the tree you've posted here is not really all that remarkable and will work into a mediocre tree. This is not a "rare" specimen. I hope your others are a bit more interesting.
Look, I'm not trying to make you look bad, or be an asshole, but what exactly makes the tree here worth digging it up? I mean, beyond being free. what is pictured is typical ERC nothing more nothing less. I know most collectors who have been at this more than a few years wouldn't give it a second glance. What you have will take a very long time to make into a "meh" tree.
The specifics:
It's trunk has no real significant taper with the first two feet.
It has a double trunk that doesn't have any coherency as a design element that can be used--there are just two trunks that grow parallel to one another.
The "main" trunk has branching all at one point, and those are BIG branches that can't be removed for danger of killing the tree. None of those three branches has much of any interest visually. Removing two and leaving one, leaves a mostly uninteresting trunk behind...
the smaller of the two trunks has one low branch, but not much else. It's long extension trunk is bare for what looks like a foot or more before more branches appear.
The bark is typical ERC. Nothing special about that either. All ERC have flaky bark.