This is best done by comparing what other homes have Sold For in the general vicinity of the property.

Whenever I have sold a home, the mortgage put on the property is almost the entire sales price.

-Should I just focus on getting a private lender to help financing instead? 

I'll Private Message you as well. 

Hi @Andrew Merritt,You have a few options.First, you can try to bring in your brother-in-law's parents as private money lenders. 

Currently only buying of MLS.Also interested in private funding...

Find a private money lender (friends/family)4.

It was being sold subject to all liens, taxes, ect.

The tax value doesn't tell us, or you, what it is actually worth....only market comps, in Similar condition, size, etc. cn tell you that.Hard money, or any other private lender is going to want 20-35% down, and has no interest in making interest for only a month or so.Also generally, the higher you get above the median house price in the area, the longer and harder it is to sell.

Any private lenders in Maine?