The number of coin shops in Penang has dwindled, as interest in numismatics ebb. Nevertheless you can still find a few such shops particularly along Pitt Street. The specialize in rare coins and paper money. For more current items, you can also try the various money changers in Penang.
Tan Coin Trading
76 Pitt Street
10200 George Town, Penang
Phone: +60-4-262 4264