I had a similar thought (since surely it's obvious) - even in a dilapidated state, they could easily sell these off since they're so iconic all over the world. In the US and in a few other countries, I've seen dozens of fake ones (and probably some real ones) in various settings.
Now, I suppose it is a significant question whether any of the people with fake ones would actually buy a real one if it were available, since the price would have to be a lot higher.
I like the idea of selling them as store decor, but even then the audience is limited. Ideally you'd want a big brand with lots of stores to buy them, but there aren't that many British (or faux-British) brands in the US with lots of stores. Barbour, Burberry, Ben Sherman, French Connection, Topshop, and some smaller ones like Ted Baker have strong British identities and retail stores in the US, but not in great numbers.
Actually, I think some of those stores already have them (possibly even real ones), and it's not a given that they'd actually want one in their stores.
So that leaves what... indie vintage shops and the like, British-style pubs and restaurants, private collectors... probably not as strong a market as we might think.
On second thought, maybe there's a reason there's a graveyard of them
Now, perhaps if someone bought them all for cheap, shipped them over in bulk for relatively little money, and sold them as-is for not too much ($500?) there'd be a market. I just don't think it's that realistic a proposition. It's something your first reaction to is "oh, that'd be awesome to have" but upon further reflection you don't actually want to bother.
More likely, someone in Asia will try to grab these up. Vintage US and UK stuff is big business there, and not just in Japan.