you may be right but available is a pretty big loophole for example many companies use drop shipping where they bill the customer then order the product to be shipped directly to the customer by a third party the third party then bills the company for the product. this is done by large corperations particularly computer companies, Dell comes to mind they now only manufacture and stock a small fraction of the computers they sell. I'm not sure how availability applies to CL. I still don't think it is Illegal to require payment in full in exchange for prebooking a new product as long as you are stating that the buyer is prebooking and not buying stock off the shelf.