I have heard that you can buy them in Jersey for ~$200 apiece.
Moving them is more expensive.
There are some folks here who sell them for $500 to $1,000 apiece depending on size and quality. I like the idea of making a home with a modular design out of these things. You can put any exterior you want on it an virtually no one will know that the home was made from a shipping container unless you tell them.