Also known as Odyssey² and Odyssey³ in USA. Three different models were distributed all across Europe: the basic model, Videopac G7000 (practically the Odyssey²), the very rare Videopac G7200 (with built-in B/W screen) and the most advanced version Videopac G7400 (known in USA as the never-marketed Odyssey³). The first is not impossible to find, the second is very hard to find (in particular because it was too much priced for his time), the last one is rare too but not as much as the second.
I'm working to publish more in-dept informations ASAP!