For their 50th anniversary celebration next year, American Atheists is holding an Art Show and Silent Auction (proceeds would go to the artists themselves):
The theme of the Art Show “Atheism Alive in Art.”
Artwork displayed in the Art Show and Silent Auction must be one-of-a-kind items, not available elsewhere and available to be sold by silent auction during the Art Show and Silent Auction at the National Convention. No reprints, copies, additional pieces, smaller replicas, or additional works of the artwork in the Art Show and Silent Auction shall be sold at this convention. Artists wishing to sell a large quantity of merchandise through traditional means may purchase an exhibitor’s table separate from the Art Show and Silent Auction during the National Convention.
The deadline is December 15th if you’re interested!