You can no longer buy them to use for upgrades. Instead, any leftover stacks in your inventory can only be "sold" to at the Tower for small amounts of Glimmer. Historical Context and Usage
In modern Destiny 2 (post-Season 19), planetary materials like Helium Filaments have been deprecated. helium filaments destiny buy
The exchange rate was typically for 20 Helium Filaments . Destiny 2 (Pre-Deprecation) : You can no longer buy them to use for upgrades
In their prime, Helium Filaments were more than just a currency; they were the "fuel" for progression. The exchange rate was typically for 20 Helium Filaments
While you can no longer buy them for functional use, they remain a nostalgic symbol of the Moon's "grind" for veteran Guardians.
In the Destiny universe, were a vital planetary resource found on the Moon, essential for upgrading gear. While traditionally harvested in the wild, players could also "buy" them through various vendor exchanges depending on the game version. The Evolution of Purchasing Helium Filaments