I have been collecting Ellery Queen's Mystery Magazines (EQMMs) for years. I have a fair number, and hope to get more. Someday (soon?) I'll drop my lists of extras and wanteds on the Web. In the meantime. . .
I designed an Access97 database to keep track of my EQMMs, and am making a skeleton version available (including all the month/year/number information for sixty years of EQMM).
Currently, EQMM's home on the Web is http://www.themysteryplace.com/eqmm/index.shtml.
A good short history of EQMM is available at http://meltingpot.fortunecity.com/kirkland/266/eq/eqmm.htm.
I store my EQMMs (well, those in my official "collection", from before 1980. . .) in Mylites2.