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Little spendy as im sure in typical hydrostream fashion it will need a core and transom but it does look really nice.

http://minneapolis.craigslist.org/ank/boa/3141902626.html

Looks like it is also listed on E-Bay. Starting at $3,500.00

http://cgi.ebay.com/ebaymotors/1976-Spirit-of-76-Hydrostream-viper-Real-nice-all-original-Rare-Fast-Fun-/120961380483?pt=Power_Motorboats&hash=item1c29dc3083