Strange coins aren't really buying things, it's crafting. It doesn't assign any value to the goods being obtained vis a vis other goods. A Bad Juju would cost as much as a Suros Regime if he was to offer both. You also can't get strange coins via cash. It's really only the ego that makes that a contentious issue. I don't even remember if Xur has sold Hawkmoon yet. It's not a big deal to me.