What would you do in this case?

[musicyouneed]

A buyer in the US purchased seperately 2 CD's of the exact same.  One was Brand New and the other was near mint.  I sent emails on both listings and she has not responded as I think she made a mistake.  I did a bit of sluething and found out she is 57 years old so is not a youngster.  Now there are people who do buy 2 of the same (collectors etc.) but this was Willie Nelson so I don't think.  I do have her phone number so I could call her, but what would you do?

[recped]

I would ignore until Monday and if I hadn't heard back I would ship the 2 cd's.

Maybe they plan to give one of them to somebody else?