No I'm not the buyer but I'm in the same situation as the OP. I bought an N950 before on ebay, then sold it because I was disappointed. There was more things that pushed mo to sell the device other than the disappointment. Paid a shitload of money, got a shitload of money. Nothing special.

Anyway I did get the same reactions. "donate it to a dev", "give it to someone who can make use of it" "you're not allowed to sell this" "it has NOT FOR SALE written over it." blablabla and now tired of seeing these reactions again.

I have a fair knowledge of law and know exactly what rights are. I agree that it's not right that a loaner is selling a loaned device. But that's his problem. What the buyer does is completely legal and it is perfectly legal to sell this if you bought it. The agreement is not applicable for buyers and for sellers who bought it before. No need for a fuss.