Well you did the right thing, the nice thing, the generous thing every opportunity you had. You should feel like the man, not like you got ripped off.
You could have said you got rid of the suit already, and you could have never said anything at all. But you helped out a small company with rad vibes. This is good. Also think of the kid who got the suit. I bet he's stoked that he actually got it, and not that his suit was mistakenly shipped and lost.
Yeah you had a time that you could have made some extra money. But you didn't know that. So it may be a missed opportunity, but it turned out for the better for the guy getting the suit and for Saga themselves. And you still get something free. Win win win situation, rather than mega win for you and lose lose for the other people.