redeemer

/ri'di:mə/
Noun
  1. someone who redeems or buys back (promissory notes or merchandise or commercial paper etc.)
  2. a teacher and prophet born in Bethlehem and active in Nazareth; his life and sermons form the basis for Christianity (circa 4 BC - AD 29)
redeemer
A merchant acts as a redeemer for the pledged goods.