there are probably easier ways to make 200,000 pounds than digging up the foundations of a large building in the middle of London,(reply>), @Alan Holck As a keen coin collector without any money to spend on this coin i can quite comfortable say that due to it sabsolute rarity this is liek finding a gold bar down the back of your sofa and I can imagine several collectors going full out bidding for it. The only problem is that it would technically be stolen goods so would never ever be sold.,(reply>), wait for it to go under renovations like the last thief did,(reply>), Definitly. But more fun?,(reply>), Cost you that in permits and congestion charges.,(reply>), @Gaarnet It depends how many collectors want it.  If there is only one  collector then it will go for a lower price.  If there are, say a half-dozen enthusiastic collectors with deep pockets, it could go for £200k or more.