Spink is only a guide really. I found when dealing that there are myths that prevail, and to be fair, Spinks are simply one of the many guides that perpetuate them. For example : 1936 pennies have a market value only a fraction of what is quoted, and are pretty much unsaleable unless BU. George VI pennies are almost worthless unless BU - ignore prices for EF coins. 1894 halfcrowns are very scarce and yet hardly rate higher than average for the series. Ignore prices for farthings in VF or lower from 1911 onwards. 1958 halfcrowns in AUnc aren't at all scarce, yet look at the prices! Bun farthings aren't worth what they are quoted in EF unless rare. 1754 farthings, 1758 shillings, 1787 silver, 1806 halfpennies, 1816 silver, 1887 JH silver - all really common, never pay catalogue value. although 1887 jub is generally common, there are the scarce and rare varieties among them,like the properJEB ON TRUNC 6d, you couldn't class that as common surely