I've been to collectibles shows, along with every flea market, antique (usually meaning junk, but neat junk) store, etc. I can ever go to but I've never found one DS item. Ironically, my one friend who loathes DS was fortunate in finding two items at such places for me: the original soundtrack album, and the game. But over all these years, I've always batted zero (somewhere, in one of these places, collecting dust on a shelf, is the original Josette's Music Box first offered for sale back around '69 for $5.95, and I'll find it).
As an aside, I also collect stuff dealing with historic ocean liners. I cleaned up when I was in Paris, going through the flea markets that line the Seine. My best scoop was finding an article from the First Class Reading and Writing room from France's most prominent and historical ocean liner. I knew it was authentic, and I paid forty bucks for it (however that translates into francs). When I had it appraised, it was worth $5,000. I'm having it buried with me, or I won't go.
Gerard