thanks everybody for the comments
Ransom: By now, I have been collecting Vectrex for almost exactly theree years...
Nathan: I also have multi-games cartridge,althoug Vectrex is a system that deserves having the complete games with overlays, etc...However,not a cheap system for sure...
Desfeek: Yes, certainly, i want those "very rare" games and I'm aware of how expensive they are. First I want to complete the "general" catalogue, then begin witch lighpen and 3d-imager. And a Usa-Vectrex or Japanase-Vectrex would be a good addition (however I'have never seen a japanese Vectrex on Ebay on being sold in any forum)