About $142 to $191 as of 2026-11-09, based on 4 recent eBay sales with a median of $152.
Recent eBay sales: $150 (Conkers Bad Fur Day Nintendo 64 Authentic Cartridge); $130 (Conker’s Bad Fur Day (Nintendo 64, 2001) N64 Cartridge Only…); $153 (Conker's Bad Fur Day N64 Authentic Tested Working Nintendo 64…); $180 (Rareware Conker's Bad Fur Day Nintendo 64 N64 Game Cartridge Only…).
Loose cartridge or disc vs. complete in box: the box and manual can add as much as the game itself, so say which you have. Authentic vs. reproduction: popular titles are widely faked. Check the label print, the board inside, and the screws. Region: a US game sells to US buyers. Japanese and PAL copies are a different market and usually sell for less here.
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