I bought a 64G Transcend® JetFlash®710 drive from eBay recently as my previous "tiny keyring drive" (A Sandisk Cruzer Force) had passed-away due to some kind of mechanical failure (For once not the loop that secures it to your keychain/lanyard, but the plastic holding the flash-module inside the shell).
In the past you always had to be wary of flash storage bought through eBay (The brand-name forgeries get more and more convincing as time goes on). So this article is covers my analysis of what I received.