其实很简单，如果你在那个item的页面看到，比如，
Price: $21.99
With Gold Card Purchase: $14.29
就说明可以有金卡的35%off

但是以下情况就没有（简单说，就是没有那句 with gold card purchase)

Regular Price: $39.99
Sale Price: $18.99
Cyber Monday Hot Buy; No other discounts apply, including the GNC Gold Card

Regular Price: $17.99
Sale Price: $12.99
Hot Buy Item: No additional discounts, including the GNC Gold Card discount, apply.

Price: was $11.99 Now $3.99