11. But some ETFs, mainly those based on foreign-stock indexes, sometimes sell at premiums and discounts. 12. On-demand video at premium prices has been a staple of sex sites for several months. 13. They are designer mutts, a category of crossbred dogs being sold at premium purebred prices. 14. Of those, nearly 20 stocks are traded at premiums . 15. Japan's gourmet apples, meanwhile, still sell at premium prices. 16. Lillywhites'policy was to compete on quality products ( which were charged at premium prices ). 17. The first fruits of this research are often products marketed to professionals at premium prices. 18. Generally, like the shares of other fast-growing companies, they still trade at premiums to the market. 19. As a result of fostering this loyalty, sports organisations can afford to charge prices at premium . 20. And some are being sold at premium rates.