Sears offers the Weller/Portasol Professional Self-Igniting Cordless Butane Solder Kit, model no. P2KC, for $39.99. Opt for in-store pickup to avoid the $4.49 shipping charge. That's tied with our July mention and the lowest price we could find by $13. It features Piezo ignition, adjustable temperatures up to 850° F, and up to one hour of continuous use.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.