Some interesting news has come in! Included on the back cover of the latest issues of Otaku USA (August 2016) and Mangabomb (Vol. 12) magazines are advertisements for Tomoyo After and Harmonia's Steam releases respectively.
The adverts list the prices of Tomoyo After and Harmonia as $19.99 USD and
It could also be they’re charging more because it’s a new release with HD graphics
When Kanon and AIR were first released, they were priced the same as Rewrite and AB 1st Beat, and you can be sure that they did not have as much content
It does sound very cheap indeed but I guess that they are making sure they provide the best quality for those who are willing to buy it. Anyway, I think it’s great that they are taking the time for those who have been waiting patiently for the localisations. The prices could change but I guess we’ll see what happens then.