Karfever
No doubt the guys here will steer you through the maize. I would be buying here through the forum first.
My thoughts are that an auction based purchase may get you a bargain or you may pay a high price and possibly sight unseen.
I have seen this question asked here many times and in most cases prospective buyers are directed to a Cobra by someone on the forum.
I would buy this way and stay off the eBay. I'm not anti the eBay, I just believe 'clubcobra' members know what's about..
Most people here would check a Cobra out for you or know the history. What a resource..
Just my $0.02 worth.
Bernie