I certainly understand your point of view Droneklax, and barring very extreme circumestances (like if I ever needed money any way I could get it for life-saving surgery for one of my kids), I too am uncomfortable with selling upgrades.

On the other hand, upgrades are very limited and there may be situations where I don't really have quite enough to cover all my domestic trips, but have too many SWUs which I usually reserve for international trips. In that case, I can use a SWU for a domestic trip (which seems like kind of a waste) or give it to someone who has HK49s that they don't need but has need of international upgrades.

What do you think is the best way to approach this very delicate issue?