The rich are not like you and me. They have better junk. And the Church Mouse makes this difference extremely clear. Don't be put off by the silver-haired matrons. These ladies know good stuff at great prices when they see it. The Church Mouse is a "resale shop, dear, not consignment" owned by the Episcopal Church of Bethesda-by-the-Sea. Designer clothes for adults and children, shoes, linens, crystal, glassware, jewelry, kitchenware, furniture, draperies, antiques, and art are just some of the things available at this tidy, airy shop two blocks north of Worth Avenue. A three-piece Giorgio Armani suit might be had for $115, a fine men's jacket for $50, or a designer love seat for $250. On a really good day, an entire room might be for sale -- tables, love seat, couch, lamps, art, and curtains -- all custom designed and virtually new. Don't ask why the Palm Beach socialite donated it, just buy it. You'll be doing a good deed: The proceeds from the shop, about $300,000 annually, are plowed back into the community through grants to nonprofit agencies, as they have been for 30 years. Still, the best thing about shopping here is strutting down Worth Avenue afterward and knowing how much you've saved.