Last time I asked (about 2 months ago) the avgas at Luxor was around $14 per usg - but you don't have to buy it by the barrell!
Luxor is not (AIUI) mandatory handling but doing it yourself is tedious and time-consuming; taking bits of paper here, there and everywhere.
It is generally around $500 landing/handling etc, etc which gets it all done quite rapidly. They also get good rates at the hotels and will take you there and back.
Our usual handlers at Luxor are v efficient, use email and can arrange things at other airports if needed - you don't always get an answer to faxes south of the Med; even when you can get through.
If you are down that way, Sharm is quite a nice stop.