What a pain, sorry you had to deal with this...it sucks,...HOWEVER, if the "buyer" asked to return it immediately then it is his-her prerogative. It does suck, it is a hassle, you don't deserve this time wasting nonsense
from a buyer however move on rapidly & give this "tire kicker" no more of your valued time of any sort, that's is my .02 cents. Re-list it while it's on the way back from Mr. Picky Pants and move on.
This guy doesn't deserve a "good guys" time! If he was serious he would have asked the case be replaced, a credit of $35 or $40 depending on the books value? Or split the cost of a new case since most
cases are "brand new", they have a little bit even if a tiny amount. : - ) Please promote him to Amazon, offer him a 10% coupon, an e-coupon to switch to Amazon exclusively?