Agree with Dopogue. Every Speakers Corner/Decca I own is an honest piece of work. Quieter surfaces, wider dynamics than the original, no screwing around with frequency balance like Classic Records so often does. Speakers Corner seems to cut the kind of records Decca would have cut if they'd had access to similar quality vinyl and more advanced cutting technology.
Even if an NM- original is a very early pressing, it's unlikely to compare sonically. It certainly won't be worth five times the money. That's collector-mania pricing, not sonic value pricing. Buy the original as a collector if you like, but for listening buy the Speakers Corner.