1969 Opel GT at Kissimmee 2023 as W206.1 - Mecum Auctions
1972 Opel GT for sale on BaT Auctions - sold for $7,700 on August 16, 2021 (Lot #53,221) | Bring a Trailer
Opel GT Classic Cars for Sale - Classic Trader
Automotive History: The Opel GT. 1968-1973 – The Long Road From Inspiration To Production with Many Cooks Adding to the Broth Along The Way. | Curbside Classic
Opel GT 1900 Found in Superclassics' Classic car directory