You can buy art and tennis shoes at this year's winner for Best Place to Buy Good, Cheap Art. Premium Goods has built a reputation for regularly having exhibits of cutting-edge outsider and urban art. (A new show goes up every four months or so.) The artists here (Melinda Mosheim and Y.E. Torres among them) show work that has a decided pop, graphic vibe, popular among young — and often financially challenged — art lovers. Many produce graffiti-like paintings; others veer toward the torn collage aesthetic, and still others embrace wheat-paste posters. The one unifying aspect of their work? It's all modestly priced.