How can I judge the quality of a feather or down product before I buy, and why is there such a large price difference between one down-filled pillow or duvet and another?
Related Questions
- How can I judge the quality of a feather or down product before I buy, and why is there such a large price difference between one down-filled pillow or duvet and another?
- Suppose that people buy more of product X when the price is high, and less of product X when the price is low. Does that violate the laws of supply and demand?
- Where can I buy a quality vitamin D product for the best price?
