that's a lovely scam.
a 2.5 gram bar for 100 GBP.
at current gold price (29.77 GBP per gram), that bar is actually worth 74.43 GBP.
for the 250 gram bar at 10,250 GBP, the actual value is 7,442 GBP.
If you have some collectible made of plastic do you price it by it's weight times plastic price?