In Uzbekistan a couple of years ago, I saw some Graeco-Bactrian coins for sale in a market. The price alone (a couple of dollars each) indicated that they were fakes. But can you spot the one very obvious clue that these were not produced in Hellenistic Bactria?
Hellenistic Far East Bibliography, maintained by Rachel Mairs. This site provides access to the original bibliography publication (Mairs 2011), along with updates. All publications are available as free PDFs to download.