Here are some links you might want to visit, I've found them useful in my search for games and information.
G&W sims A very clever programmer, I think. Several Game & Watch simulators for the PC.
Clints Handheld Bonanza. THE site for handhelds of all makes.
Nokrums Game & Watch Page Some nice scans of boxes and instructions.
Below are collectors I've traded with in the past. Many thanks to all of them.
Rik Kerkvliet. A collector from England. See his COMPLETE collection here
Andi Lorenz. A collector from Germany. See his collection here
Henrik Olsen. A collector from Denmark. See his collection here
Fredrik Kellen. A very successful collector from Sweden. I'm so envious! See his COMPLETE collection here
Jaro Gielens. A collector from Germany. Very nicely designed website. See it here
Michael Davidson. A collector from New Zealand. Massive collection!! Be sure to check out the car boot page. Click Here
Tim Smith. A collector from Australia. See his collection here
Tom Spilliaert. A collector from Belgium. See his collection here
Simon Lo. A collector from Hong Kong. See his collection here
Harry Yiannakis. A collector from the UK. One of only 2 UK collectors with a complete collection. (Hopefully I'll be the 3rd) See his collection here