Sears offers the Craftsman Bolt-On Corded Unit, model no. 009-35592, for $49.99. Opt for in-store pickup to dodge the $8.25 shipping fee. That's tied with last week's mention as $10 off and the lowest price we could find. It accepts a wide array of tools and features a 4-amp motor and all steel chuck.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.