Sears offers the Craftsman 302-piece Mechanics Tool Set, model no. 35303, for $299.99. Pad your order over $300 (this ratchet extension bar is $3.99) and apply coupon code "SEARS35OFF300" to drop it to $264.99. With free shipping, and excluding padding, that's $85 off and the lowest total price we could find. It includes six screwdrivers, 34 wrenches, three quick-release ratchets, 187 sockets, 12 nut drivers, 40 hex keys, and other tools.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.