Joanne Lane gave you the best answer....and I would add the following; as your building sounds like a mix of residential and commercial it will be your cash flow from the building that will help to determine your highest and best price. I would recommend you find a good commercial appraiser in your area and pay to have an appraisal done before placing your property on the market. If there is not a building in the area that compares to yours an appraiser will have access to solds of similar buildings in upstate NY, and will advise you on how to price the property for your location. Also, LoopNet is a good commercial site, however you would need to be a Realtor to place your listing for sale on that site. If you decide to list your property with an agent you might want to ask if they have a LoopNet account. Good Luck!