Idk if anyone else have these problems but sometimes i cant buy items from bargains...
after selecting the items and press buy miroku just gives blank dialogue and the transaction doesnt go through...

This happens when it exceeds the max # of the item you're buying thats in your inventory
eg you have 99 pumice stone in inventory
you try to buy pumice stone, it wont go through.

just stick the said item into the storage

ah thanks