Wouldn't be surprised. Ancient Egypt is a major tourist attraction and earns the locals a bit of money. Breaking their past and their livelihood would be enough for people to get on those looters. Also one imagines that stuff to be a source of national pride. It would be like swiping stuff of from the Smithsonian American History Museum. Sure it might be worth something to the right buyer...but who's going to by something like that if there is really only one of a kind, and it was stolen? (the metals and gems might find a market...but only after they get destroyed)
(On the other hand maybe they stole the secrets of the mystical past and will use that knowledge to make a future where everyone settles their differences in one way only....
card games 
)