A collection of pencils is commonly referred to as a "pencil case" if they are stored together in a container. Alternatively, if they are grouped without a specific container, it can simply be called a "set of pencils." In some contexts, people might casually refer to it as a "pencil collection."
Pencils
Pencillophobia
Someone in VA with approx. 106 different pencils
graphite
A person who sells pencils and inkpots is called a stationery vendor or a stationary supply retailer.
The person or organization with the most pencils is not definitively recorded, but the Guinness World Record for the largest pencil collection is held by a collector who has amassed thousands of unique pencils. Individual collectors or companies may have extensive supplies, but specific figures can vary widely. For a precise answer, it would depend on the criteria used to define "most pencils."
At collection of stamps is refered to as a stamp collection. They are frequently kept in albums. Philately is the name for the study and collection of stamps.
it is called a range of mountains
a collection of fish is called a school of fish
A collection of fish is called a school.
A collection of sayings is called a "proverb" or "aphorism."
A collection of opinions is called a "consensus" or a "survey."