Partner (or two) to go to the Acorn's Antique Show & Sale. I went last year and got an amazing 1930s scarf. This event is probably as close as you'll get to a flea market in Utah. Hundreds of vendors, each specializing in a specific era or type of antique, from jewelry to toys to furniture. It is so much fun.
My usual shopping buddy, my mom, will be in Seattle the weekend of the show, so who wants to go with me? We could make it a date and even get some lunch.