Here, just go to ebay and set preferences to sellers 25 miles within your local zip code.
A top rated seller called Mclean Surplus sells all sorts of old equipment.
http://www.ebay.com/itm/Brother-SX-4000-Electric-LCD-Portable-Typewriter-Daisywheel-Tested-Working-/190969778397?pt=BI_Typewriters_Word_Processors&hash=item2c76af90dd
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