I am new to this forum and not quit sure if anyone can have an answer to my question.

Here it is.

Is there a way to sale fully operational software package together with the source code to a company or an interested party?

I know that I can try to market it my self and so on, but I am really more interested to get just one off payment for software rights. I knew that with proper marketing it can be sold for a lot of money. I did several sales myself, but I rather would concentrate on development then on sale side of it.

I did extensive look over the internet but did not any information on this topic.

Beforehand thank for an answer