Thanks for the replies.
I already use ActiveDen but in this case I do not want to sell the source code.
I'm not really looking for a form/ecommerce solution.
What I'm looking for is a website that will sell my software and grant a licence key. Then provide me with a Flex compatible API that I can call from my Flex application to verify the licence key entered into my application. I know they will want to take a % but that's fine. Both Sharify or Shibuya would fit the bill perfectly for me but they're both only in Beta.
Thanks for the assistance.
Jeffry, thank you so much - that's exactly what I was looking for... I'm going to evaluate those suggestions. It's amazing that neither or those came up on Google.
Thanks again - I think you've saved me a lot of time.
Both can handle product licensing, but not taking payment.
Here are the differences I've found so far:
Nitro-LM is way more expensive. You'd need to talk to a sales rep to get a quote. Zarqon can be as cheap as $25 for one product perpetual license.
Nitro-LM uses their servers to store license information. Zarqon uses Amazon AWS, which has to be setup beforehand.
Nitro-LM is more feature-rich and flexible. It can handle module encryption.