I have a page on Byzantine coins: http://augustusmath.hypermart.net/Byzantine.html Today some coins from that page , often substantiallysold and I reduced the prices on the rest. A couple are rare, e.g. "H" (= 8 pentanummia) at Byzantine Cherson, possibly under Maurice, but in the name of the Cherson mint: XEPCONOC (X = Chi, the first sound in "Cherson"). On the other hand, many are inexpensive. Today I added to my page of ancient-coin books for sale: http://augustusmath.hypermart.net/Books.html If you like reference works, take a look and, at the end, click on the link to other books for sale at: http://augustusmath.hypermart.net/numislit.html If I have a book you would like, I think it will be cheaper than anywhere else, often by a wide margin.