If the 5 are over and above what is reasonable to have for guarantee work, I say give them to him now so he can sell them for a good price (or I should say, these absurd price which likely won't last for long.)
Seems to me that he's the guy who ran this show so it's legally and ethically right that the units are his outright. We would not even know about them but for his high level of communications and transparency.
My thoughts exactly. He could have just kept quiet and no one would have known. While I like the idea of getting an extra one for free, I really think arklan deserves the extras.
I might add that whatever the factors, this group buy put sapphires into peoples hand more quickly than any other that I know of, and for a rather modest markup as I see it.
And if ~arklan is one of the probably rare persons in the community who can be relied on to actually perform the desired warranty work over the coming 6 month period, we should count ourselves among the most fortunate Bitcoiners so far.