Putting in an offer is so much more than naming your price. Learn what you need to know and prepare beforehand so you can negotiate like an expert.Focus on three things: State your intentions, show that you have the financial means to make the purchase and make a personal appeal to the seller. The property and improvements which the Seller is agreeing to sell and which the Purchaser is agreeing to purchase is known as. To make an offer on a house in NYC you'll need to email the seller or listing agent and include a REBNY Financial Statement, a loan preapproval letter.