Find 50pcs purple courier mailer bags Envelopes in Shopzilla's Office Supplies category: Compare prices of 50pcs purple courier mailer bags Envelopes and buy your new 50pcs purple courier mailer bags Envelope at a good price. When buying Envelopes, check how shoppers rated the different online shops. Simply select the store that has the Envelope you're looking for. If a Office Supplies store isn't rated yet it means that Shopzilla is still collecting shopper reviews.