dun be surprise if you find OM lens are ex$ in sg...go do some research in the ebay u'll know.
many of my OM lenses were from ebay.. almost all of them bought at price much lower than those qouted in sg... including the 90 macro, 180mmf2.8, 300/135/24mm, etcetc..
why? i guess because sg has no market for OM, thus ppl qoute prices with no reference, like nobody business.