Rare 20p coins set to sell for 500 times face value during North East auction
A minting error on a small number of 2008 twenty pence coins has made them highly desirable, with some expected to sell for as much as £100 at auction.
Rare coin worth over 250 times its face value dubbed the 'holy grail'
A rare 20p coin could fetch more than 250 times its face value to someone lucky enough to find one. Back in 2008 a minting ...