I have got 2 "quality" office models in the past couple of years from our local university surplus, one was new in the box for only a few dollars, and it does both Micro AND mini cassettes. Here is a link to similar unit:

http://www.martelelectronics.com/t2020lp.html
 
Look for gov't/univ. surplus auctions/stores in your area or of course Ebay 
 
Robert Wasserman
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Sound Archives Proj. Asst.
Wisconsin Historical Society
608-264-6473