Amazon.com Inc has made a minority investment in Ashford.com Inc, an online retailer of luxury products. In exchange for a $10m investment and a marketing relationship, Amazon.com will hold 16.6% of Ashford.com’s outstanding common stock when the transaction closes. The deal will add watches, designer jewelry, leather accessories, sunglasses, fragrance, bath and body products, ties, scarves and writing instruments to Amazon.com’s growing internet department store.