The Opel Kadett was a small family car manufactured by the GM's German subsidiary Opel starting way back in 1936. The modern Kadett started its A, B, C... nomenclature with the 1962 release of the Kadett A, and this next one looks like a really interesting driver for the cash. Find this 1971 Opel Kadett Wagon offered for $4,500 in the SF Bay Area, CA via craigslist. Tip from Kaibeezy.