But you'd better hurry. The sale ends on Wednesday.
From the announcement:
To usher in 2015, BattleScribe Pro is on sale: half price!
You have until 23:59:59 GMT on Wednesday January 7th to pick up a copy on the cheap. You can get a desktop key from the BattleScribe store, or the mobile versions from Google Play, iTunes or the Amazon app store.
Happy new year!