Get this Mainstays Highland Knolls 7-Piece Outdoor Dining Set now for only $247 (was $598) at Walmart. You save 59% off the retail price for this backyard patio dining table set. Plus, this item ships free. This is the best price we’ve ever seen this set go for online. The Mainstays Highland Knolls Dining Set includes two swivel rocker chairs, four arm chairs, and one tempered glass top table. Sales tax is charged in most states. Deal expires soon.