I would suggest you test this version against a version with everything removed up until the sentence "You could be thinking..."
That's your real sales letter. The most serious problem I see is the letter doesn't get started until then. It's pawing the ground, seeming to say something, but avoiding any real motivating factors until way, way, into the body copy.
If this test works, trying taking everything in the upper part of the letter, distill it down, and change "You could be thinking..." to a more compelling lead-in.
I get the impression from only a quick scan that this letter is a victim of "long copy versus short copy" syndrome. The idea is not that long copy outpulls short copy, therefore just make copy long no matter what you do and you'll be successful.
You have to maintain a certain level of interest throughout. And I think making this change will.
Read my post here on
how to get to the point in copy.