If you must purchase using a purchase order, we recommend that you purchase Isadora via a reseller you trust. If your reseller does not currently offer Isadora, please ask them to contact us via the support form so that we can help them become a reseller.
Comment for Monty: People no longer need a reseller to purchase with purchase order. This option can be chosen in the store. Look for the canned response with FastSpring and their non existing net 30 policy. They deliver after purchase.