Not buyable solus great sword

[SinofPride]

Ok so I'm playing anniversary on Xbox one x game pass but I made sure to get the amount of gold to buy the sword even it's non discounted price and I lt won't become buyable in the shop keeps inventory even tho it's in stock any suggestions.

 

[Dark Drakan]

Ok so I'm playing anniversary on Xbox one x game pass but I made sure to get the amount of gold to buy the sword even it's non discounted price and I lt won't become buyable in the shop keeps inventory even tho it's in stock any suggestions.

Does anything here help at all? As you can also obtain it via a different method.