Is Costco Leather Furniture Good Quality . Abbyson leather sofas run from $1400 to $3000, prospera from $1500 to $2700 and simon li from $1100 to $1900. I love how costco stands by their products and quality with easy returns. Allington Brown Leather Chesterfield Corner Sofa Costco UK from www.costco.co.uk Check the back of the furniture to see whether there’s a single piece of leather or several stitched together. The stuff looked good and set good. This is especially the case when it comes to full grain or top grain leather.