The Pathfinder Bones line from Reaper Miniatures is a great value collection of 25mm heroic scale minis produced in polymer/plastic. This makes the miniatures super value and cost a fraction of the cost of the metal equivalents, especially if you're after a large dragon.
Remember, this line is officially licensed for Paizo's popular Pathfinder game so if you want great value official Pathfinder miniatures then look through this collection.
The Reaper Bones Miniatures in the Pathfinder collection cover a wide variety of fantasy genres and are all supplied unpainted and with integral bases.
Reaper Pathfinder Bones