How much I can get for my Directory?

Hello Friends,
I have a web directory site from last 5+ years but I never give proper time on this site. So I am thinking to sell out this. But I need your valuable suggestions that should I sell out this site or not and how much money I should hope to get? Web directory details are as given below:
URL: http://excellentwebdirectory.com/
Domain Age: 5 Years, 8 Months
Script: PHP Link Directory (link back retained) – $25
Google Page Rank: 2
Unique Visitors: 15,518 October 2013, according to…
How much I can get for my Directory?

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