You can offer any amount you want on a home. In a buyer’s market — when fewer homes are selling — you may get a counteroffer to any serious offer you make. But sellers can also ignore offers they deem too low. Your Realtor should run a comparative market analysis to help you understand a home’s market value compared to its list price. This will help you decide how much to offer. Your offer, regardless of its size, should be backed up by data.