Sears offers the Craftsman Hydraulic Stool in Red, model no. 82941, for $49.96. Opt for in-store pickup to avoid the $19.08 shipping charge. That ties an October mention as the lowest total price we've seen for this stool. (It's a current low by $46.) It measures 10.5" x 28.5" and features a padded seat and slip-resistant base.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.