Morgan must have felt troubled, as per his habit, if Gao Yang gifted him a good gun, he would reciprocate with a gift of approximately equal value, but this time Morgan found it difficult to reciprocate.
If it were a transaction, Gao Yang giving the gun and Morgan paying money would have been simple, but the problem is Gao Yang gifted the shotgun as a favor, and for Morgan to simply pay money wouldn't be appropriate.
Insignificant trinkets, just accepting them is fine, even from the perspective of ordinary people who consider thirty or fifty thousand dollars a substantial amount, Morgan would have accepted it. However, this gun is not just worth thirty or fifty thousand, nor even three hundred or five hundred thousand, but rather, it's priceless, making it difficult for Morgan to handle.
