I paid a little less (about 15 years ago for mine). YOU GOT A GREAT DEAL! Last one I saw at a gun show was about $500 ~ $600 - before the shooting and buying panic. That was for a "bare" M1 carbine in "good" condition.
I'd say you bought it at half price anyway!! They are great little guns!! I love mine! I've had it over 25 years now! and wouldn't think of selling it! You did well!