Or........
Q: How much are 500,000 miles worth??
A: Nothing according to the airlines, however according to how they make provisions on their books, approximately $300.
Or,
A: Well, you honour, I just gave them all to the make-a-wish foundation.
Or,
A: (To the attorney on the other side) Of course I'll give her $25,000 worth of tickets, should I take care of informing the IRS for you??
Lastly, in response to the above it could also be 12 economy tickets which recently went for $399 each (total value $4800), or if you want to go for the Concorde example, it would also be about $4800 as per the FT/Starwood deal.
This is why miles are a can of worms and why they are not reasonable "currency" in a divorce settlement.