Nightingale-Conant Self-Help Copy Example | Free Copywriter Swipe File
I really like the contradictory headline (opposite of conventional thinking).
This ad offers a free CD program to show "proof" the program they want to actually sell is worthwhile. (two-step sales process).
Check out this two-page self-mailer and add to your personal file of copywriting examples.
Here's the (no opt-in) link: Nightingale-Conant Self-Help Copy Example | Free Copywriter Swipe file