i am rich
The Silly Collector!
That is the best advice you can give to any collector in any hobby. I have completed two transactions through craigslist that were great deals but only because I offer cash and pick up immediately or as soon as possible. If the seller does not agree or ask me to wait a few days No Deal! I move on and don't think twice about it. Two many times I have I been caught up in bidding wars and and seller jacking up pricing on me.
I have made 4 transactions and so far I have not encountered bidding wars yet. Like you said, if I seller does not agree with me, I carry on.