As a "collector" of turbine engines and having experience of putting reheated ones in a car, I can tell you this is not worth £565,000 as an engine. Generally the bigger the engine the cheaper it it is. If it can't be flown it's just a display piece or someting to put in a vehicle or run as a stationary engine. Generally it is easier to do this with smaller engines. Even the most valued ones like the Allison / RR C250 turboshafts go for 4 or 5 figures not high 6 figures. They have some scrap value but not much.
Not many people have the money, space and interest for big engines.
I once bought the APU from a Vulcan and was offered the Olympus engines for free If I removed them properly. This was becuse their weight was causing balance and structural issues. I declined to tke them. Last engine I bought was a Honeywell APU that was removed from a scrap aeroplane, complete with all accessories and in runable condition. I was the only bidder on it at £200.
Robert G8RPI.