I need to create a shop where you will be able to choose the products you want and only pay a fixed deposit in the amount of 10€ no matter what the final price is (it will always be higher then the deposit). The rest of the price will be payed on spot when the customer comes to our shop to pick up the products.
Is this possible?
Yes... with a bit of fiddling
maybe a 100% discount and a std. payment plug set at €10 fee
display the before discount price.. something like that