As a dealer let me chime in.
First let me start with an option for you to try a Tandem Island. There is a rental in the Keys. May be others. Hobie has a rental locator on their website.
http://www.paddlefloridakeys.com/product/roto-molded-mirage-island-sail-kayaks/Second there are many factors that come into play for your local dealer. I'm sure they would love to sell you the boat. It is tough to qualify customers. I have spent many hours working with dreamers both in the showroom and on the water. Some have then gone online to purchase. Support your local dealer. They are the ones that can help you the easiest after the sale.
You can't demo it online so why hold them to a different standard.
We are right on the water and offer demos on the spot for most models. Many people just want to try the Mirage drive and that's it. Others are looking at performance of the different models. It is very labor intense.
We don't have a Tandem Island available for demos but do offer rentals. Usually people want to spend some time trying it out.
I wouldbe happy to hash over some of the policy that makes it tough but I am going to keep that off the board. PM me if you need to.