If, and its a big if, but if it was completley original, original paint, no welding, all genuine parts, no scrapes, dents or repairs then its worth a few quid, its an early model Discovery and it will be very collectable in years to come although how many years is an unknown, classics such as Renault 5 turbos were once had for a few hundred quid as little as 5 years ago, your looking at a few grand now and a lot more for a minter!
There is something about that one thats bugging me though, the paint looks too fresh like its been resprayed, if thats the case then I bet its not as OG as he is making out and then its worth the same as all the others out there...