通报一声，macys有小黑瓶买50ml送20ml

兰蔻小黑瓶精华50ml送同款20ml https://www.macys.com/shop/product/receive-a-free-full-size-genifique-0.67-oz.-with-a-purchase-of-advanced-genifique-youth-activating-serum-1.7-oz-or-larger-a-52-value?ID=11422148
满$80还送美妆两件套(含睫毛膏、卸妆水)，任意订单送4件小样，搭配着买了霜，很划算啊 https://www.macys.com/shop/makeup-and-perfume/lancome?cm_kws=lancome&edge=hybrid&id=28688

这个价格一般吧？我怎么记得前几周大瓶的买一送一啊？