D&D 5E How do you guys handle pricing one shot magic items?

[Sword of Spirit]

1/20th the price for a consumable item like a potion or scoll, unless it is a very powerful item like a luckblade.

 

[Azzy]

Have you perused Xanathar's Guide or the Sane Magic Item Pricing guide? Each tackles the issue, perhaps one of them is to your satisfaction.