Sears offers the Craftsman 21" Gold Series Self-Propelled Mower, model no. 12A-A2B8799, for $269.99. Opt for in-store pickup to avoid the $69.99 shipping fee. (Delivery may not be available in all ZIP codes.) That's $90 off and the lowest price we could find, although we saw it for $6 less in June. It features a front drive, single speed propelled drive system, and dust-blocker grass bag.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.