跟单1. GNC Triple Strength Fish Oil 1500, Softgels 120 ea qty:4 Price：35.99 + Buy 1 select GNC vitamins, get 50% off the 2nd Link：http://www.drugstore.com/gnc-triple-strength-fish-oil-1500-softgels/qxp410610?catid=183249 2. GNC Triflex™ 240 Caplets qty:4 Price：59.99 + Buy One Get One 50% Off Link：http://www.gnc.com/product/index.jsp?productId=4266766 团长，这个Triflex我查了一下好像drugstore没有Buy One Get One 50% Off的促销，而GNC有。您帮我比较一下看哪儿便宜在哪儿下单好吗。谢谢啦！