I was caught once by this trick, and quite handily too. A seller, who shall remain nameless and who has since disappeared from eBay after, I suspect, wreaking much havoc, knowingly or unknowingly placed some...
The answer to this question was a lot easier in the early 1960s when I first started collecting. In those years, countries like Australia and Canada were issuing less than twenty stamps a year. Mint copies...
Inevitably, when you go through a lot of stamps over time, you will come across damaged copies which are not really suitable for your collection. Once you have decided to discard a stamp (in the case of more...