I've bought mine over the Internet, and I've also used medical suppliers who have websites that you can order from. My main concern was the handling of the strips before they were sold, and while they were in transit. If your strips don't require refrigeration (the InRatio and the CoaguChek XS), the handling issue is probably not as important -- and if you work on a boat, you probably MUST be using a meter that uses strips that don't require refrigeration, if you're planning to do testing on the boat.
I saved money on my first order of ProTime strips - from a certified medical supplier - by having an M.D. order them and reimbursing him for his costs. It probably wouldn't hurt to ask a friendly doctor if he or she could place the order for you. You could save a fair chunk of money -- and the doctor should be comfortable, knowing that you'll be able to test well into the future.