Selling courses

I'm not familiar with any LMSs but I am familiar with how they function. To record the results of a person taking a course will require a database. You can create a database with XML based documents and use javascript to read/edit the XML information.  Articulate software can access external javascripts so they can create this information.  Downside is that you may not have the robust reporting feature unless you create a simple javascript page that can pull simple information like who took it and if they passed or have the results emailed to a recipient that will track this info and then create a spreadsheet from it.  This is new territory for me so I won't be able to provide you very much info on this. This may be a workaround to having a very complicated LMS system.

Another option, again not the expert here, if you decided to provide the LMS for the customer and want to retain the customer's look and feel of their site, is there a way to edit the launch page of the course. Or is there a way to embed the course on the customer's site but still be in the LMS?  An example would be youtube videos. You can embed the video on you site and you don't actually have to have the video on your server. It's all stored on the youtube server and they track all the information for you. Of course I'm not sure about the requirements to log in into the LMS system itself for reporting.

Sorry for not being able to get you an exact answers, I'm just throwing some ideas out there and hopefully one of the real experts will jump on this.