I post about a lot of great places to buy artist prints, and here's another one! Charmingwall, based in New York, specializes in a curated selection of open edition art prints.
They have prints from a great selection of artists, including:Apak, Evan B. Harris, Heiko, Juliana Bright, and many others. You also have the option of buying the work matted and framed, which is always nice. Check out their entire selection, here.
Evan B. Harris:
Apak (also print at top of post):