Hi Stan
It will be nice if there is pre-order system (pay part of total - deposit) with some rules with ajax validation and calculation like:
Important options:
Pay part of total money (deposit) - Percent % or constant value of total money.
If you pay part of money you will lose all discounts (Option Yes/No)
Additional options (not important):
With pre-order you can use selected shipment or payment methods
For Countries
Cost (percent or total). If it is percent it will bi nice if there is option: % of total or % of not payed part. This is a commission for courier.
Tax
Minimum order amount for using pre-order
Not payed part will be pay on delivery