A friend of mine is trying to sell some Brazilian (Digiplay) overlays and manuals that she found at her house (this stuff belonged to her older brother back in the 1980s). She created an Ebay account to sell these items, so I'm sharing it here to give a hand. You can see all 10 auctions here: http://www.ebay.com/sch/rgruner7/m.html?_nkw=&_armrs=1&_ipg=&_from=
She's offering interesting stuff like Brazilian manuals and overlays for The Power of He-Man, River Raid and Tennis (among other titles).
Happy bidding and thanks for reading!