Their websites states: "Several Colorado book stores carry GRP titles, including the Tattered Cover and Book Buffs. If our titles are not in your favorite shop, you can order many titles from Small Press Distributors, every title from amazon.com and bn.com and books.com, or ask your store to order. It is very important to support independent book stores and presses, so if you can, please find ways to patronize them."
I'm going to hope that the last part is meant as tongue-in-cheek.