Would be intersting, if not revealing, to know what value these specialists predict for the other surviving 4-engined dinosaur, and what premium insurances ask for to insure their value. After all BA cancelled some orders and QF is quietly looking to get rid of some.
The other 4-engined dinosaur. Hmm, that would be the 747-8I one assumes? It's doing pretty poorly, utterly rotten in fact, and is only being kept alive by orders for the -8F. Which, incidentally, are also drying up.
Of course, you are probably alluding to the A380. BA have not cancelled any orders, but they have deferred deliveries. QF is a basket case, and is presently looking at shedding 5000 jobs. If they can't make the A380 work across the Pacific, I'd suggest that speaks more of QF's ability to run a business than the aircraft.