I am an agent with Coldwell Banker in Old Lyme. I appreciate that you do not want to waste a Realtors time until you know if you want to buy or not. why not give me a call and I can go through with you the whole buying process from start to finish, this should help you in making a decision about buying, this will not cost you or I anything other than an hour of our time.
Please feel free to either email me or call me on my cell
Unless you are talking about two identical properties, it is impossible to place a value difference on a property. There is no doubt that the home closest to the beach has greater desirability and therefore more value than one more than a mile away.
Generally speaking the property closer to the beach should command a higher value.....how much, is anyones guess!