We have a Serta Upholstery Mercury Row sofa by AllModern. We purchased this new three years ago for $350. The sofa is super comfy since it was made with Serta material similar to the Serta mattresses. There are no visible stains and the upholstery is stain resistant in case you have kids or pets. The sofa can seat four regular sized adults. With its neutral color and streamlined design, this sofa will fit in with any decor.
It is very similar to this in size and shape: https://www.allmodern.com/furniture/pdp/mercury-row-nadia-sofa-bed-a000881982.html?piid=1802114156%2C1759296300
Pick up from Escondido Village, Stanford.