I found 40-50 sealed nes games at a flea market 2 weeks ago, and one sealed game boy game. My only find of a lot of boxed stuff, there was only 10-15 different titles though.
I noticed some variations are not listed in the rarity guide (blue demon attack being one) but if you click on "blue" the game shows up in the list. I think the blue ghostbusters also didnt show up.