ARV estimate disparity with RE Agent. What now?

[David Hald]

I am looking at a duplex that needs a full rehab in a midwest city. 

My real estate agent sent me a list of comps, and by what I can tell from recent sales, the ARV could be about $85,000.

However, I asked her for her estimated ARV number, since this is my first deal, and she came up with $165k-170k.

Now I'm a bit stuck, because this is my first comps calculation and now I'm doubting if I did it right/wrong/too conservatively. 

Any help would be greatly appreciated.

Thanks!