appears to be a sage...... chopped ....
In case you are unaware, Different is probably the preeminent M-14 guru in the world. You should immediately buy a copy of his book and if he posts on a subject that subject is pretty much over.
As far as the "where and how much" build it yourself and price depends on what you put on it. This would appear to be built of readily available parts.
Edit: wow, three virtually simultaneous posts on one thread.
The collapsible stock is not sage.
You can see where the collapsible rails would normally run.
The front looks like they took about six inches off.
you gots some cool toys Mr H2O man
do you know if there are any accuracy reports for that custom sage ebr rifle of LT. Tyson's