Good publicity stunt when it happened, and a good one now, as it got at least you folk noticing and discussing it (me included ;D).
What would the real thing be worth if it was still around today? I'd guess scrap plus a few hundred bucks--or less, if you were a museum with a little cache.
My curious side wonders if those old jet engines would be functional today, or even if they could have been maintained. It would be a lot cheaper to buy a Williams cruise jet engine for a one or two shot run, or a few small rocket motors from Aerojet.
Eclipse Aviation tried to get two Williams jets to power their lightweight air taxi, but the cruise missile engines could not be upgraded to sufficient reliability. Eclipse had to go for heavier P&W engines, setting off a vicious cycle of redesigning for heavier weight and prices for the jet skyrocketing.
Sandia National Labs (and others) used rocket motors to propel things like locomotives down test track for crash studies. They were testing storage casks for waste nuclear fuel, not the integrity of locos. Fun to watch. . . I think they used an old Alco, and an old F-4 Phantom when testing the concrete for nuclear plant containment vessels.
