Downloading paid apps with Raccoon
Raccoon is able to download paid apps. It does, however, not implement a payment flow of it's own. This means, you can only download an APK that you have bought externally, e.g. via the Google Play website.
Please note that paid apps often perform an online license check and will refuse to work if they cannot contact Google's license server (regularly). Unfortunately, these license checks require a serviceable installation of the official Play client app on your device.
If privacy is a concern, do not buy any apps that require the com.android.vending.CHECK_LICENSE permission.