drjeff is offering a bunch of photography prints for sale. You can name your own price to receive a digital high-resolution image, or if you'd prefer to receive a photoprint it's $20 for an 8x10.

ETA: The userpic is one of drjeff's thumbnails, No. 28, "A World Within".

Also, and I'm sorry I missed this one earlier, but seeing Dr. Jeff's reminded me that I thought I'd seen pecunium doing something similar earlier this month, and that memory was correct.