A smart course of action before making an initial offer is to get to know the home of interest intimately. After all, you will be making one of your biggest commitments in your lifetime with the purchase of your new home. Remember, an offer is a starting point that, ideally will lead to a binding purchase contract. But, until both buyer and seller have agreed to all the terms, including a final price, each party has an opportunity to abandon of the deal.
From forming your opinion, to price, assessing the value, seeing the conditions, etc. You need to know all details and be informed in order to make the correct guess.