Earlier quoted context omitted.
There's never a root reason. But because real estate agents are middlemen in the process, there's an incentive in a hot market to not act as an honest broker. When the market isn't "hot", a realtor has an interest to move quickly. When the market is hot, they have incentive to move their own listings so they get both sides of the commission. In my case circa 2005, I bid $50k over list via the broker who was managing…
For the record dual agency is actually illegal in some places: https://www.homelight.com/blog/dual-agency-is-illegal-in-som... Though I will point out that in most of the jurisdictions in the link provided, there's nothing that prevents your scenario - a third party offer is turned down due to the dual agency bid being favored by the sellers because they never received your bid. Only in Colorado, Florida or Kansas is…
Of course the reality is that there is very little governing their conduct and behavior. Without a functional "exchange" or disclosure rules, both buyer and seller are dependent on good faith.