The original ban reason seems pretty lame, but after reading SF's for sale rules:
http://www.supraforums.com/forum/announcement.php?f=63
They are pretty clear on what they allow. So after violation some pretty clear rules and getting a ban for it, you attempted to work around the ban by creating a second account and got your IP permabanned?
I hate to tell you but we would do the same thing to you here.
You could try emailing one of them, with an apology. That would have a better chance of working IMHO. The path you are following isn't likely to do anything but piss people off.
With that said, have fun with your petition, but I doubt David or Dusty would give a flip about it. It wouldn't change my mind at all. If anything it would add more perma to your permaban.