I know people love these things. I do too ... I just don't have anywhere to fit more furniture in my house, especially not with the step tansu that I'd like to wedge into the living room somehow. Here are several I've found this week on Craigslists around the country:

west coast

• 30 drawer birch library card file in Redding CA: $350
• circa 1940 15-drawer card file with bakelite handles in Spokane WA: $175
• circa 1960 wooden file cabinet with brass fittings in San Leandro, CA: $100
• Ludlow letterpress cabinet with composing table top in Morro Bay, CA: $1000
• two Hamilton metal letterpress / typesetter's cabinets (with light) incl. clean job cases from the same seller as above: $1000 each

midwest

• 60-drawer wood library card file with slide-out table and original brass hardware in Romeo, MI: $800
• 60-drawer wood library card file with three pull-out tables and original brass hardware in Southwest Detroit MI: $350
• 60-drawer dark wood library card file from Capital University in Sunbury OH: $475
• dark wood antique 4-drawer file cabinet in Minneapolis MN: $550
• pretty 8-drawer double file cabinet from the Toledo University Library, now in Delaware OH: $100
• petite 12-drawer wooden library card file on matching stand with brass pulls in Carmel IN: $300
• interesting multi-sized-drawer wooden file cabinet - with possible map drawers? - in Rockford MN: $395
• very large 24-drawer (extra large drawer size) library card file in St. Louis MO: $650
• wide tabletop 15-drawer library card file in Mt Vernon IL: $175 or trade

east coast

• petite tabletop 6-drawer card file in Ithaca NY: $50enormous, ex-built-in 19th-century dark wood
• 72-drawer library card file near Boston MA: $1200
• 14-drawer library card file (5x8 cards) with two missing drawers in Browns Mills NJ: $45

south & southwest

• tabletop 2-drawer Remington Rand oak card file in Crawfordville FL: $80
• wood and plastic 60-drawer & 3-shelf library card file in Jacksonville FL: $650
• two large four-drawer wooden file cabinets from Library Bureau SoleMalers, early 20th century, near Orlando FL: $335 each
• 15-drawer, 2-shelf tabletop library card file, includes table, near San Antonio TX: $200