Armalite quit producing the Ar10T uppers?
got one from a couple of years ago and was looking around for prices. Thought I might test the waters on selling it . Anyone know what these would go for now?

Barrel length, handguard, with or without bcg and charging handle?

Is it "new", if not, how many rounds? Threaded muzzle or straight crown?

If they show "out of stock" on their site, that doesn't really mean they quit producing the 10T upper, does it?  I seem to notice that when Armalite "does away" with a gun, component, or part, they usually just remove it when inventory is gone.  I see the 10T upper on their site for just under $1k on the site.  762AR556 is right in asking about specific elements of your particular upper, but I'm assuming a factory 10T upper.