As a side-project to my IT Consultancy business, I have developed a software product which I intend to sell. The URL for the new product is at http://www.scichart.com
I am partnering with FastSpring as a payment processor. They charge a reasonable rate and can process credit card payments / purchase orders worldwide.
Now I've just noticed during testing that the limit for payments is $15,000. However, my product is priced between £499-£1249 ($750-$2000 USD) per license and I have a few clients interested in buying a site license. I am wondering how I can process large payments like this.
What is the protocol?
Should I just send them a paper invoice and a SWIFT/IBAN code to do an international bank transfer?
FastSpring has recommended that I split orders into multiples if it goes over the limits. I'm unhappy about this as it looks unprofessional.