I mentioned this in the BA forum, but I'll summarize here: winning this might or might not be such a great deal.
You get 2 coach tickets from the BA gateway nearest to your home to New York, 2 nights stay in an (unnamed) NYC hotel, 2 seats on Concorde from JFK-LHR, 3 nights in a nice London hotel (I forget which, but it sounds nice), and business class tickets on a non-Concorde BA flight back to the gateway. Yahoo/BA puts the value from $13,800-$18,000 (depending on the gateway you use), and it would be difficult to dispute that value. So, if you're in a 31% tax bracket, you'll pay roughly $4300-5500 for the trip. And, you won't get any FF miles.
Now, if someone really wanted to take a nice long weekend in New York and London, traveling on Concorde in one direction and business the other, $5000 (give or take a few hundred) would be an extremely good price. However, some people, if they were to spend $5k on a vacation, might choose to spend the money differently.