What if there was a "Soul Capacitor" Item you could buy from Gelf? You could store unused Soul Charges in there, and sell a full capacitor load for money. This would be a bit like the Spin Saws in TRPG2, but you could sell, methinks 10 Soul Charges for somewhere between 500 and 1000 gold? This could become an option later in the game, when everyone has higher-level characters that need to be trained, and you have WAY too many souls. The number of souls to go in the capactor maybe could be upgraded, instead of redeeming for money, but as the capacity was upgraded, you would get less and less extra money for each additional soul. This, if your characters rarely die, is a good way to get rid of those extra soul charges you have and will never use.