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Why not just try out a number of free services to get an idea? www.urlrate.com is free and it only takes a minute, for example. Here is a link to a list with links of other websites that can help calculate value. http://mcjonline.com/blog/websites-to-calculate-your-website-worth/
It should be pretty easy to determine. My quick search showed a value of less than $10 (I assume that is a monthly figure, but I closed the tab before I checked).