I have to admit that this post is mostly for me: I could never remember which of the various Thieves' Guild volumes I already had lying around in Germany, so I never ordered what I am missing from Different Worlds. Now I can finally complete my collection!
I have a thing for the products that Gamelords Ltd. used to put out in the 1980s. The quality of most of their products is remarkably high although some of the "desktop publishing" from back then is pretty sad. (If someone gave me the raw text files I'd probably do a new layout for free!) Heroes and Other Worlds has a fascinating article (including further links) on Gamelords and Thieves' Guild as well.