I think I would have to disagree with you on this one parazapper. Faith in a product is very important in satisfaction. I would never sell a product to someone who is so doubtful. I seriously doubt it would work on them, no matter how much or how well they use it.
I know your hands are tied when it comes to really telling it like it is, and selling your product. That is part of the problem...but not all of it.
Giving a money back guarantee should be enough to at least let people know that your heart is in the right place. Now getting people to trust that you will give them their money back is another thing. Do people have faith in you? Do they trust?
I don't know you from adam but strangely I do trust you and would buy one if I needed one/wanted one. But that's just me. Each person will have to decide for themselves. The internet makes it a very hard place to learn to trust.
I like that you take credit cards and paypal as well as checks and money orders. Gives more options for people to make their financial decision. And if anyone can not afford your products then you can suggest the guy down the street who makes and sells their type of zapper cheaper. But they will always wonder in the back of their mind if yours is somehow better and they won't know unless they try it with a good attitude of faith and trust in you and your products.
Keep doing what you are doing, perhaps one day your pioneering spirit will open doors for more freedom. Stay faithful.