Sounds like you're looking to place an offer on a property in Old Brookville or you're very interested in looking at homes in this town. If you want to discuss sales price ratio's, contact me @ 917-741-8294 or e-mail me @ jstone@laffey.com. I'll explain these ratios dating back to a year from last month. If you're not working with a Realtor, I recommend you do.
Jeff
Keep in mind that a property is worth what someone is willing to pay for it...if interested in the referenced property rather than worrying about ratios, review comps with your agent--recently sold similar properties in the immediate area; or check out http://www.mlsli.com