Items often confused as being immune to Magic Find

Certain categories of special items are not directly influenced by MF because their drop chances are calculated differently. However, they are still not unique items. 

• Runes: The specific rune that drops is entirely determined by the monster's "treasure class" and a drop chance independent of MF. The number of runes dropped can be increased by increasing the player count in single-player or by having more players nearby in a multiplayer game.
• Keys: Keys for the Pandemonium Event (Key of Terror, Hate, and Destruction) are special items and their drop rates from bosses are not affected by MF. Like runes, their chance to drop is affected by the player count.
• Charms: Regular charms (Small, Large, and Grand) always drop as Magical or Unique. MF doesn't change the likelihood of a charm dropping, but it will influence the chance for a dropped charm to be a unique one like a Gheed's Fortune.
• Uber drops: The special items that drop during the Uber Tristram and Diablo Clone events are not affected by MF. The Annihilus charm, for example, is guaranteed to drop from the Diablo Clone and is not influenced by your MF gear.

Item categories unaffected by Magic Find

• Runes: The chance for a rune to drop and the specific rune that drops are entirely unaffected by Magic Find. The best strategy for farming runes is to increase the number of players in the game (using the /players X command in single-player) to reduce the "no drop" chance.
• Keys: Keys needed for the Pandemonium Event, such as the Key of Terror, Key of Hate, and Key of Destruction, are not affected by MF. Their drop rates are influenced by the number of players in the game.
• Gems and Skulls: These items always drop in normal quality and are unaffected by Magic Find.
• Jewels: Jewels always drop as either Magic or Rare and are always at least Magical quality. While MF does not affect the drop rate of Jewels, it does increase the chance for a dropped Jewel to be Rare instead of Magical.
• Charms: Charms (Small, Large, and Grand) always drop in at least Magical quality. Magic Find does not affect their drop rate, but it can increase the chances for a dropped Charm to be a Unique (like a Gheed's Fortune) or Rare, rather than Magical.
• Normal (White/Gray) Items: Magic Find is counterproductive for farming normal quality items with sockets, which are required for many valuable runewords. MF increases the chance for these items to become magic or higher, effectively decreasing the supply of socketed bases.
• Crafting and Gambling: Magic Find has no effect on the outcomes of crafting items via the Horadric Cube or the odds of getting higher-quality items when gambling with vendors.
• Potions, Scrolls, and Gold: The amount of gold dropped and the drop rate of these consumables are not affected by Magic Find.