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A person who collects beetles is a coleopterist.
a strawber.
Bibliophile
collecter
supernatural
A cravatologist.
A key enthusiast is one way to identify them. There is no actual term to refer to someone who collects keys out of enjoyment, but if they keep the keys out of fear that they may find a use for them after throwing them away, they are potentially a compulsive hoarder.
A badge collector.
A paper collector
a button collector
A gem collector
A car collector?