It's worth what someone is willing to pay for it.
domain valuations are quite subjective. Its not like a used car, where there are numerous examples to compare against.
5 years ago it would have been "worth" more (in my opinion) because domain suffixes were quite limited. Now the available naming has been really opened up, people are able to get a lot more choice with their domain
Most domain valuations take into account more than just the name, but also things like traffic, SEO / rankings, age and links to the site etc (i.e. active domains go for a lot more, than dormant ones)
Also, a .info is valued lower than a top level domain like a desirable .com
you can google domain valuations which will take these into account, and you'll find the returned figures will vary wildly (I did a quick search for you, and of the few I tried, I got anywhere between $46.00 and $13,000)
As I said, if someone really wants it, they'll pay you for it. But I wouldnt bank on buying a villa in the sun on the proceeds
Hope that helps
Simon