Watch some YT videos first of them actually firing.

About 10 years ago there was a small flood of AR-10s onto the market and most of them have had a long, long, long service life. Feed problems, magazine problems, extractor problems and sometimes a reciprocating "non reciprocating" charging handle.

As a collector they are cool as F and the gun of my childhood dreams. They are the original Armalite rifle conceptualized by Stoner. There are so many cool factors I can't even have that discussion but unless you only want a reference example with no expectation of reliable shooting experiences you might want to rethink.

I want one one day, because I eventually want one of everything. But I will have a SIG 510 and an AR-16 before I get one of these. I also think I'd rather own a semi auto Knights SR-25 variant. But one day I probably want a Sudanese AR-10 if I can find one in "Not F'ed over" condition.