We offer Vendors a 25% wholesale margin. Not all products we sell on our webstore are available to Vendors, considering the shelf life of some of the products we make and sell. Larger orders, to be negotiated on a case by case basis with us, can get a larger margin. In order to be accepted as a Mycology-supply.com Vendor, you must download the Mycology-Supply.com Vendor Agreement, and then email back the completed form to orders@mycology-supply.com. Please note that we will not provide all of our retail products to vendors, most particularly those items with a relatively short shelf life.