Based on Azzure’s previous post regarding the removal of the flat transaction fee, we were to understand that the rate had been replaced with a 15% fee. This has been corrected, however, as Kaivax from Blizzard explains that this was merely a configuration error.
We do not currently have plans to alter the auction house fee structure for the beta, as previously discussed here:
As always, thank you for your feedback. This is exactly the sort of thing that makes a good beta test.
I would have been very surprised if they had removed the flat fee for posting items simply because it would open the service up to an enormous amount of flooding unless they introduced a very modest number of daily postings.