......you may have to wait some time, their in decline in uk wetlands. ccgb2010 is priced at six guineas, do the same tax rules apply to guineas, were they ever used for currency? In the Great Recoinage they were replaced by the Sovereign so they are not legal tender as far as I'm aware. However, people still called 21 shillings a Guinea and this makes it £1.05 today, so times that by 6 for 6 Guineas and that gives you £6.30, the price of the book. It was used as legal tender originally being equal to 20 shillings but then increasing in the late 1600s (I think) to 21 until 1816 of course. I don't think they have the same tax rules. Sion