The pop-up is back. Every few months the antiques dealer Posey Fisher (who has space at Anna’s Mostly Mahogany in Highwood) takes over an empty storefront at 501 N. Wells St. and fills it with estate sale finds for a weekend. Catch it today and tomorrow from 11 a.m.–6 p.m. In addition to furniture, Fisher says she unpacked 30 boxes of small decorative items—china, glass, linens, small kitchen appliances, books, and art (gifts, anyone)? See Fisher’s blog for photos of items for sale, and to find out about future sales. Contact with questions.