John,
The key to that whole deal was the sending of a check along with the letter. The presupisition is "it's hard for a paper to turn down money"
According to that premise I think it would still fly.
Explain to your client you're going to let them in on some really underground space ad buying tactics. Explain the deal...why it works...but also explain the worse thing that can happen is they don't cash the check.
If they are able to secure space at the discount rate...and you write the ad that pulls in a decent ROI...than you're now their new go to guy.
Great place to be.
Also, if it works you can go into round 2 of your underground tactics and reflect back on the Michel Fortin, Gary Halbert interviews where Gary talks about advertising the advertising.
Again...because you're revealing these industry secrets you'll automatically be elevated in your clients eyes. They'll perceive you as a marketing-medic.
Now...with that said...do what JP said and start the thread on the fax blast.
Zachary Romero
www.backdoorcopy.com