Find 40 foot trailer for sale Party Supplies in Shopzilla's Gifts, Flowers & Food category: Compare prices of 40 foot trailer for sale Party Supplies and buy your new 40 foot trailer for sale Party Supply at a good price. When buying Party Supplies, check how shoppers rated the different online shops. Simply select the store that has the Party Supply you're looking for. If a Gifts, Flowers & Food store isn't rated yet it means that Shopzilla is still collecting shopper reviews.