Won't do you any good with musty smell. I had a pr of linen pants like that, they smelled worse during and after steaming, like I activated something :/
I don't agree that it's inefficient, I wouldn't want to get a jacket that smelled musty whether I was taking it to the tailor or not. I'm not (typically) selling items at garage sale prices, so there's a little room for some good customer service. If I got a jacket that was smelly, I would probably return it. I got a shirt one time that looked like someones very dirty laundry, how can you sell something like that at any price? If you can't sell it for enough to make it presentable, don't buy it.
Tx, all you have stated is common sense. I dont think anyone here would sell an item with musty smells.
But, if I were to come across such an item I would wash it or send it to the cleaners.