Surely many of you are familiar with Beso? It’s a shopping site run by my close pal and former coworker (and frequent Girls of a Certain Age commenter) Elise Loehnen, a person who—when it comes to finding treasures in unexpected places—makes me look like a piker. One of Elise’s proudest moments was when I agreed to let her run a bit in the magazine about some amazing bags she’d found on a site that sells old west reenactment supplies.

You can buy stuff from about a squillion retailers through Beso—everything from your Net-a-Porters and Shopbops to your hipster indie retailers like Acrimony and Totokaelo. But Beso is also home to many of our favorite Catalogue Challenge brands, and others like them. What we want you to do is  create a collection composed entirely of  pieces from those retailers. Here’s a sample collection Elise came up with, just to give you a better  idea of what we’re talking about.

Your collection must have a minimum of 10 items, but really, the more the merrier—as long as it’s all stuff you can really stand behind. Click here to get started creating yours. The winner gets a $250 Beso gift card.

You have until noon on Monday to send in submissions. Have at it.