It varies and the price can be from $50 to $1000. We do not recommend going too cheap on a vaporizer though because you are risking getting a product that doesn't work very well. The cheapest vaporizers we sell are the DynaVap VapCap M and the Xmax Starry. We've vetted them and they work very well for the price point. If you see vaporizers at a lower cost than that, I would think twice about buying them. It's not really worth it.
Vaporizers on the higher end like the Volcano Hybrid are incredible pieces of technology. They are very efficient and deliver some of the best vapor you'll ever taste. You're paying a premium because of the technology and build quality. More expensive vaporizers usually come with a better warranty too!