First of all, these are not "my" sales strategies, but as I said, auctions. The question is solely how many "rounds" one should have (and with exactly one round it is simply called a tender procedure). And I just asked a question about whether this is common in Germany, and what the advantages and disadvantages would be. Characterless for me would be concealing defects, lying, pretending false facts, etc., but not informing about the details of tender procedures/auctions.
Secondly, I am not even sure which procedure is better for the seller: one or several rounds? Let's say there is someone who *definitely* wants it, and there is only one round. To be sure, he or she might bid everything they can afford, let's hypothetically say €60,000. Then this person bids €60,000, even though no one else would have bid more than €40,000. As a seller, of course, I am happy about that.
Let's say there are 2 rounds. In round one, the person can only bid a little higher at first, to test the waters, but not the absolute highest bid. Let's say €45,000. Then I send the email for the second round: "Current highest bid is €45,000, does anyone offer more?"
At least the interested party knows that nobody has bid higher in the first round. He could stay at €45,000 or only increase slightly, e.g. €50,000.
Hmm, the more I think about it, the more one round makes sense. The potential buyers then have to carefully consider what it is worth to them and bid accordingly... Multiple rounds are probably rather disadvantageous for the *seller*, because it gives buyers the opportunity to "test from below." Which is probably the reason why sales platforms mostly promote the single-stage procedure (I guess that they (and realtors) tend to work more for the seller).
That is exactly the kind of thoughts and "insights" I actually created the thread for.
And if my trains of thought are wrong, please feel free to correct me!
Best regards, Andre