The biblio Master System 1.61 is available now. I added several visuals – from my personal collection – and by a new version of the finder. You have certainly pointed out that there are too many false eBay results for the Sega Master System. The cause is pretty simple : many of the games for this console have been released for the Game Gear and the Megadrive/Genesis too. The keywords research is so polluted.
The new finder uses today more efficiently the biblio data to avoid, as possible, the false results. I hope you will appreciate. The other biblios should benefit of this feature in near future.