10% of the Zazzle product net sale price will be deducted when one or more qualifying products are purchased and the coupon code ZAZZLEMMSALE is applied at checkout. For most products, the net sale price is the price of the product (excluding shipping and taxes). For Zazzle Custom Stamps, the net sale price is the difference between the price of the Zazzle Custom Stamps (excluding shipping and taxes) and the face value of the postage. Offer is valid until May 30, 2011 at 11:59pm PT. This promotional offer may not be combined with any other Zazzle promotional or volume discount offers. If a volume discount applies to your order, you will receive either the discount set forth in this offer or the standard volume discount, whichever is greater.