Exactly my experience. Having lost two coins to the German post office, I am through with sellers that use their service. On the other matter, I once had a person online discuss a coin I was bidding on. This creates a can't win situation. If I win it, I will be accused of stealing his coin. If I back off, I lose the coin.
Your examples would certainly be seen by many as being cynical, but maybe I can postulate, numbering them as you mention them: Scenario 1: I've been doing this my entire adult life. Well heeled collectors keep to themselves. They dont participate on these discussion groups, and even if they did they would not comment on lots they are interested in. Trust me in this, if they want the coin they will get it. You stand no chance. The 'Sheik' outbid me on many lots, but alas, he had billions, I had thousands. I never lost any sleep over it. Scenario 2: If Collector 2 doesnt bid (for ANY reason whatsoever), that is his or her business. More power to Collector 1, I say. Scenario 3: Bidding war. If people choose to engage in this scenario that is their problem. I am fine with my certain body parts. I dont need to show others my perceived manliness by how much I spend. I will pay $x dollars, and no more. Dont care if I am outbid. Scenario 4: Same thing. If some idiot is desperate to show the world how large his body part is (I am being politically correct here so as not to be kicked off), then that is his problem. Pay what you are willing. If you get caught up in a certain type of contest (again, politically correct so as not to offend), that is your problem. Live with it. Finally, was the marketplace efficient? Well, efficiency can be measured innumerable ways, but bottom line is that you have a minimum of two bidders. Whether they are responsible or not, whether they are intelligent or not, matter none. They made their bids, no matter what their emotions were. I dont know what this means exactly. Perhaps you can explain it further. Just what 'unreliable information' are we talking about? I dont know what 'manipulated transactions' you mean, but as to the rest of your comment, it is simple advertising. Perhaps we should all boycott Coke because they advertise?
It will only create the situation you mention if you are only willing to bid the opening price (or, the absolute cheapest price possible). Honestly, I have issues with the topic. I understand fully that people want to get their coins as uber cheaply as possible, but I simply cant understand why they are angry when someone else wishes to pay more than they do. That is not what an auction is all about.
For what it's worth, I just spent the afternoon lot viewing the Roma sale in London. If anyone has questions on specific lots, let me know. I'm quite jetlagged but still trust my eyes (to some extent...)
I've managed to turn a fairly mundane business trip into a coin-filled week I spent yesterday evening with NAC viewing their next sale and am going back today. You're certainly going to like it as it's chock full of quality Roman Republican coins (especially some spectacularly rare gold).
Flying to London for a week would totally deplete my annual coin-budget (man, there must be a better way)