Why is "Meet highest buyer" marked by default?
Well perhaps you will pay more attention now…
I believe it is like this because the designer thought that they would make it easier for people to make a quick sale. Personally I believe that neither should be highlighted – the user should be forced to make a decision, however an additional session based “remember this choice” option would be ideal, allowing users to make large numbers of quick sales but not forcing the option on them again the next time they use the trading post.
As an aside this one caught me out yesterday with the loss of nearly 1G