Yes, they are bought through friends, aquaintences and other avenues, without the manufacturers knowledge or authorization. Some manufacturers require a certain level of sales in order to start carrying their gear. Some shops work with Leisure-Pro type companies just be able to get started.
I'm in way shape or form saying that Leisure-Pro participates in activities like that but, how else do you explain how they get product? Makes you think.
I do know that if it were me running that site, I would provide links to the manufacturer's web sites, customer service phone numbers and e-mail address to be able to contact someone, should any of my customers doubt my authenticity.
Leisure-Pro and other sites like them do plenty of business now, but I predict their reign will come to a screatching halt soon!