That is a really nice sales letter and I've bookmarked it to read through repeatedly when I need to write one. It nails the long form sales format and manages to do so without sounding sleazy[1].

I particularly like the Do not buy this course section which qualifies potential customers.

[1] To be fair depending upon the target demographic the sleaziness can be increased without causing problems. If you were building a product for hard core sales guys Your Customers Can Still Afford Branded Groceries: Learn How To Capture This Wasted Revenue Today! might do brilliantly.