Zavvi have options on their website to pay via interest free credit and spread the cost by up to 6 months/payments for anyone looking to pull the trigger on this but not be hit with £150 in one go
Not sure where exactly I mentioned it a while ago but when the box-set collection was available that included S-1 > S-13, there were MANY complaints on the quality control (essentially, lack thereof) by many customers.
I'll wait to see reviews of this updated set once it reaches general pop, before I pull the trigger on this.