sakupljač

1. gatherer; collector
   Sakupljači pečuraka rano ujutru idu u šumu. — Mushroom gatherers head into the forest early in the morning.
   Prvi ljudi su bili lovci i sakupljači. — Early humans were hunter-gatherers.
2. (as a hobby) collector
   Moj deda je strastveni sakupljač starih novčića. — My grandfather is a passionate collector of old coins.

For hobby collectors, kolekcionar is more common.