Groupon offers a voucher valid for a 16" x 20" Gallery-Wrapped Canvas from Canvas on Demand for $29.99. Coupon code "CUSTOM30" cuts it to $20.99. That's $106 off list, $3 under our February mention, and the lowest price we've seen.

Of note, you can also buy two canvases for $34.99 ($17.50 per print) via the above coupon. That's $204 off list, $5 under our February mention, and the lowest price we've seen. The credits expire 30 days after purchase.