I see this is a duplex; i.e., a residential property.
That's only from the lender's perspective. For an investor, the usual rules for income property still apply. That means, you need to see the income and expense numbers for the units so you can verify that the NOI provides sufficient Debt Service Coverage. The ratio of the NOI to debt service should still meet or exceed the 1.2 to 1 benchmark (Debt Service Coverage Ratio).
Of course, that's just one way to look at it. What I would do is run those numbers and verify that the projected cash flow should be positive. That will help you determine the validity of the asking price.
A new loan product out there called a DSCR Loan (Debt Service Coverage Ratio Loan). It goes by the property's ability to provide sufficient income to meet the lender's criteria, often bypassing your personal income as a criterion. It illustrates the importance of meeting the debt service coverage criteria.
My $0.02 ...