I'm not sure why this one isn't more popular, but for the current price of $20 the Greek Lexicon of the Roman and Byzantine Periods is available in community pricing, along with three other volumes:
http://www.logos.com/product/8513/e-a-sophocles-collection
I'm mainly interested in the lexicon, as this would enable me to compare the classical through medieval uses of a Greek word in order to get a possible range of meanings for New Testament words - and it's at only $20 right now.
But there are three other volumes too:
Greek Lexicon of the Roman and Byzantine Periods (from B.C. 146 to A.D. 1100)
History of the Greek Alphabet and Pronunciation
A Catalogue of Greek Verbs
A Greek Grammar for the Use of Learners