You'd be surprised what people will buy and sell. Just inside the front door of Deluxe Junk in Fremont you'll find boxes and boxes of envelopes from now-defunct businesses, bearing 3-cent stamps and marked 1953, or postcards from Deutschland beginning with words of "hearty greeting." On a table nearby are copies of Playboy from the days when even magazines like those were still full of hand-drawn illustrations and serial novellas. Add Deluxe Junk's quirky collection of vintage clothing, accessories, furniture, games, maps, and other odds and ends far older than the shop's 32 years, and you've just stepped into someone else's life of yesteryear. ?Mary Pauline Diaz 3518 Fremont Place N., 634-2733