(money-)changer

Boyd’s Bible Dictionary:

Those who made a business of supplying the annual half-shekel offering at a premium

Strong’s Dictionary of Greek Words:

Greek:
κολλυβιστής
Transliteration:
kollubistes
Phonic:
kol-loo-bis-tace’
Meaning:
from a presumed derivative of κόλλυβος (a small coin; probably akin to 2854); a coin-dealer
KJV Usage:
(money-)changer