I have just come back from Luxor and have the following for sale:
1) Egypt Mobinil mobile SIM card with 6-7 pounds credit on it. Great way others to call you and for you to call UK for cheap rates.
2) Temple of Karnak x 2 - unused, they are student tickets so it would be better if you have a NUS/Uni ID card, but they don't bother checking from my experience at other sites.
Included in price