Sirius Dice Wholesale

This is the only app I could find that offers partial payments on pre-ordered items. To comply with regulations and payment processors, this is a must-have for any US store that offers pre-orders that will ship later than 30 days after purchase. It also allows mixed carts, which is great and helps with conversion and upsell. I had an issue with my first item setup, but their customer service team was very responsive and resolved my issue within hours.