As one of its daily deals, Groupon offers a coupon valid for a 16" x 20" Gallery-Wrapped Canvas from Canvas on Demand for $29.99. Coupon code "TRIPLE" cuts it to $23.99. That's $103 off and tied with our mention from December as the best deal we've seen for these prints.
Of note, you can also buy two canvases for $39.99 ($19.99 per print) via the above coupon. That's $199 off list and tied with our December mention as the best we've seen. The credits expire 30 days after purchase. Both deals end March 5.
Of note, this coupon is good for up to three uses.