Mine doesn't have enough miles on it (it's also an '11) but even if it did... I wouldn't hand deliver it to Canada for two weeks and hand the keys to some random people for "testing".
Sorry but this just doesn't sound like a good deal at all.
Do you have any insurance policy if you break the car? What about transportation there and back?
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2011 Chevrolet Camaro SS2/LS3 - Pretty much bone stock (SLP SkipShift Eliminator, GTO clutch fluid reservoir mod) - 13.025 @ 110.492 MPH (12s??
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1998 Pontiac Grand Prix GTP (retired) - Cam, exhaust, CAI, 12 PSI, tune - 13.465 @ 101.04 MPH