Hey Osenki, have you tried
Gamezone? They always have a selection of used carts and CDs on sale, for reasonable prices. I have ordered from them countless times and I never had any probs.
Another game shop I can recommend is Spielraum in Erlangen near Nuremberg. Send mail to
Spiel-Raum@t-online.de and ask for a catalogue. Spielraum concentrate on Neo Geo, Sega, Nintendo and PC Engine, and have a very friendly service.
Next, there's
konsolen.de, complete with online shop and stuff, but their prices are way too high for most games. However, they sometimes are well stocked with Neo games.
For new-sealed/like-new/mint imports, go to
Otaku Most Wanted, they also offer carts like MS1, Kizuna, MotW, Ninja Master's and other rarities, for rarity prices... well, they tend to feature high price tags, but offer games you won't find elsewhere.
These are my primary Germany/European game sources... Anyone with more links?