For one year, I bought a t-shirt from every place I went that sold t-shirts with the name of that place on it. I collected a total of 79 eponymous t-shirts, which celebrated locations ranging from the Carbondale Public Library to the state of Iowa to the Liberace Museum to the Alamo.
These shirts were then presented in a store-like display in the Mitchell Museum at the Cedarhurst Center for the Arts and re-sold for their original price. This display also included a catalog with images of all the shirts and statistics on their collection.
I have sporadically re-sold portions of the remaining shirts on Ebay for their original price.
Pictures of some t-shirt browsers:
Pictures of some t-shirt buyers:
You can download the catalog, which pictures all of the shirts, and collects the statistics on their prices, purchasing locations, etc., here.