I was offered to sell my site for 1500 USD

I have a site http://job.erynok.com
I made it two years ago.
At first I was engaged in this site, but then I had to let it go by itself, since more priority projects appeared.

And recently, one company became interested in this site.
She offered me for this site 1500.e.

Now I sit and think what to do.
Sell ​​it to me or not.
I am also interested in the question of how to estimate the cost of the site.
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Yes, this is not unimportant moment.
I planned to completely redo this site when I’ve finished with more important tasks.

What would you do?
And how many have requested for the site?