Is there somewhere I can pay for a professional ARV calculation?

[George Lambrakis]

I'm a first time home buyer first time investor. I found a property that I am interested in.  105k asking. When I run comps myself I get ~130k ARV,   my realtor is pulling 160k ARV.   The neighborhood supports his numbers pretty well, and I'm so new that I don't trust mine.. but I am still uncomfortable.  Is there somewhere I can get a second opinion?  I am willing to pay.     There has got to be a service out there like a former appraiser that uses the same methods of evaluation etc..?

Anyone have any ideas?

Thanks in advance