Pyromaniac villager

The pyromaniac villager would be a great addition to Minecraft. The pyromaniac would buy sand,flint,gravel,emeralds and gunpowder. He would sell, fireworks, tnt, gunpowder, flint and paper. This would make getting gunpowder for other things in the game like fireworks for traveling and tnt for excavating the ground. I believe this would not be too overpowered and the prices would be fair but not too cheap.