All the Collector's Guide links were broken during the last Wiki upgrade, and I haven't yet tracked down and fixed them all. The Mystera Collector's Guide seems to be available here though.
One of my major regrets from the time I spent compiling the Collector's Guides is that I didn't document the sources of all of the release dates better. In general the priority order for setting those was: 1. TSR catalogs. 2. Dragon Magazine previews/adverts/mentions. 3. Any online sources including the US copyright office records of publication date. 4. My own notes and records of when I added items to my collection. 5. Guesswork.Echohawk — thanks for putting this wonderful guide together. While I've seen many over the years, this is the first that includes release months for almost every product. I find this especially useful, because I haven't been able to source the release months for many of the early D&D releases, especially those from 1981-1985. May I ask where you found this information? It would be even more useful if you could detail the sources.
You're welcome to host a copy on the Vaults. I will make a mental note to let you know as and when I finally get around to updating it with late 4e/5e mentions of Mystara.Therefore, would you be okay for me to host a copy of the Mystara Collector's Guide on the Vaults?
You're welcome to host a copy on the Vaults. I will make a mental note to let you know as and when I finally get around to updating it with late 4e/5e mentions of Mystara.