Question about appraisals and how to get an accurate appraisal.

[Boe Bishop]

I own a few properties and everyone I get what I would call a "fake" appraisal. If I see that comps in the area on a duplex are running around 180k and that is the asking price. I make an offer of let's say 130k youd think that when and appraisal was done they would come up with somewhere around the 180k and have equity/0 down and no pmi. They only want to appraise it for just over purchase price so they can get a down payment or pmi out of you. How do you guys combat that?