Pawnbroker

n. moneylender who takes property as security deposit

A pawnbroker offers monetary loans in exchange for an item of value to the given pawn broker. The word pawn is derived from the Latin pignus, for pledge, and the items having been pawned to the broker are themselves called pledges or pawns, or simply the collateral.
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Noun
1. a person who lends money at interest in exchange for personal property that is deposited as security
(hypernym) lender, loaner

(n.)
One who makes a business of lending money on the security of personal property pledged or deposited in his keeping.
  

Any person whose business or occupation includes the taking or receiving, by way of pledge or pawn, of any article of personal property as security for the payment or repayment of money. 18 USC