I have researched this to the extreme, yet still, I have no idea what my best option is.
All that I need is a means of accepting credit/debit card payments with a variable price. Simple Checkout's donation function is exactly what I have in mind. The only problem is that these will not be donations, therefore I cannot use it. So my other option is to go with SIM. The only drawback is that I am required to have a shopping cart. The customers aren't buying multiple items, they are simply making a payment on an invoice. Not to mention, I would have to process the cards on my server, rather than yours. This is the exact reason
Furthermore, the customer is responsible for picking up his/her own product. In essence, the customers are paying for a reference number that they can then use to pick up their product at their nearest warehouse. Nothing is shipped whatsoever.
I am considering using Paypal, but if I can figure out a way to get this working I could save myself money.
