Levels of Quality

Quality garments can be spotted by looking at materials used and construction. A good quality garment will use stronger and more expensive materials, and have reinforced seams and matched patterns too. However, the actual price of a garment does not determine it's quality. For example, lots of mid-range brands are not better quality than their lower-end counterparts, but are more expensive because they're ethically produced and have original designs. Think Instagram boutiques, or American Apparel. Streetwear brands too will often sell a simple Gildan shirt with their brand on it for high prices. In this case, you're paying more for the status and less for the garment itself. On the flipside, at thrift stores, especially big box ones like Savers and Goodwill, you can buy high quality items for extremely low prices.

plaids being matched at seams is a sign of high quality
http://reallyhandmade.com/sewing-plaids/