My opinion on the LE restricted lowers, they don’t bring a huge premium over the non marked ones.
Some will pay a small premium for one
Some won’t pay any extra for it over a non stamped one
And some want nothing to do with the restricted markings.
That said, the ar15a4 restricted ones are somewhat rare as there wasn’t a whole lot of them out there.
As a completely stripped lower in today’s market, it might bring $300-$400.