Yes, I'd say you got the better end. And DUDE, that MIGHT be an unmolested WWII gun. You don't see any wear on the barrel where a type III band with the bayo lug would've been. You have a HIGH WOOD STOCK (that's a really big deal) , a flat bolt and a push button safety. Those are all indicators of an early build. Unless the other owner added those parts to get it back to that configuration. But IF it was an arsenal rebuild, it would've had a bayo lug and the barrel almost always has some wear on it where the bayo lug was.
Some carbines were shipped during WWII with an adjustable rear. A rear flip sight is more indicative of a WWII gun, but like I said there were some towards the end that had adjustables. If it really is a genuine WWII built gun, that didn't see an arsenal rebuild, you can pretty much double the value of what you have into it.
Plus, looks like it shoots really well and is reliable. You gotta love em. My son has really taken to the M-1 Carbine also.