==========跟单区(id, item, link, qty, price, contact)， 越线直接忽略，不下单====必须给电话，可以站短，没有电话的直接忽视
并且希望注明价格浮动范围，即超过多少钱就不要了
跟单
id: xiaofan
item: Omron 7 Series Wrist Blood Pressure Monitor
link: http://www.amazon.com/Omron-Series-Wrist-Pressure-Monitor/dp/B004D9P1A8/ref=zg_bs_3777151_1
qty: 1
price: $43.99
contact: 酒要要六二三留要
item: Omron 7 Series Wrist Blood Pressure Monitor
link: http://www.amazon.com/Omron-Series-Wrist-Pressure-Monitor/dp/B004D9P1A8/ref=zg_bs_3777151_1
qty: 1
price: $43.99
contact: 酒要要六二三留要
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