Great.... My only suggestion was to discuss this all with the guy with 900. If he is your friend, he deserves to know the truth, if you want to be friends.
He should understand that 1500 is far a better deal, but if he can't, he may not be that great of friend, and you may feel compelled to sell it to him to stop his whining. Anyway, sounds like ya talked to him. That's what I'd do.