CL can be sketchy. I buy pretty much all my tanks from CL. I'm pretty strict with it though. I ONLY deal in cash. Must see the tank set up with water, etc.
and when I'm selling I say "sorry i hold the tank for no one. If you can get here then its yours. I don't care who called first."
To many people flake out on you. of course I've flaked out on others so....just part of cl.
Great resource none the less.