Sr. Ferraz,
I'm a Brazilian, too, but I'll write in English in respect to the other members of this forum.
This is my first day as a registered user on Atari Age, and I probably don't have half of the knowledge that you do on Atari history.
Anyway, I could recognize some of the pictures that you posted on the topic and I must say that I was very, very much pleased to see them. It's simply BEAUTIFUL!
As I have said, I'm not a very experienced collector -- in fact, all that I have is an old (but still working) Atari 2600/Polyvox and a couple of cartridges --, but I'm really interested in learning more about it: from where to find good old stuff to buy here in Brazil to the basics on how to fix and preserve hardware and software.
So, if you don't mind, please send me a personal email (doassis@hotmail.com) or other kind of contact through which I could reach you and exchange some more information... in Portuguese!
Again: congratulations for your work!
D.