We will do a pre-order 500 in our store, where we take orders but don't charge cards until we get at least 500 pre-orders. This could take a week, a month or even a year. Are there alternatives to Partial.ly? I only want to provide this option for pre-order products, not for products that we already have in stock.
KAD Pre-Order — PreOrder NOW has a partial payment feature. You can set a persentage of a full peice that will be taken right after compleating the order. Rest of the amount you can request from the customer by sending invoice.