The price for web hosting depends on your needs so I will give you some price examples for different services.
Budget hosting.
If your needs are low you can use the cheaper types of hosting, a normal price is between $5-10 per month. That usually includes the domain cost.
Average to high demand.
Expect to pay everything from $7-50 per month. As stated before, your needs for disk space and data transfer makes a big difference.
Colocation
Here the pricing is higher but this service is not for every one either.
A good Colocation will cost at lest $50 per month. If you need higher bandwidth and lot of ip addresses it can easily cost twice that.