You can attain a sample of your design through either of the following methods:
1-Create a new campaign with your design. Do not add the “storefront” tag.
2-Set your profit to $0.
3-Purchase one item. You will only pay the base cost of the item and shipping.
1-Make yourself a promo code that discounts your profit on that campaign.
2-Purchase an item with your promo code. Append pr=CODE to the end of the url when you visit the campaign. You will only pay the base cost of the item and shipping.