The idea that a group wouldn't just be able to go towards a resting area when arriving at a friendly camp, especially for business, was normally an insult. But since the situation was very unique, the group didn't see it this way. The white robed healers in charge also made sure to show their respect and give waves. This staved off any possible negativity that might come from getting right down to business.
Most of the group had seen some instances of Isa getting in to a full merchant mode. They had seen how she acted and how well she spoke when in a business situation. However, they had not seen her fall in to her perfect business mode trained by her family. This left them all stunned.
The same things they had missed in Nebula were all being seen now. The dramatic seriousness that analyzed the opponent in this game of deals was clearly shown. Isa was completely separating herself from her emotional side. This showed the true depth of what she was able to do.