Well, that kind of depends on how friendly you are with your neighbor. Is there no easement that they have through any other property to gain access to a road? Is your land the most direct route to a road? The new buyer would not necessarily have to grant an easement to the neighbor, then the neighbor's land has difficulty gaining value in the future.
You could create a right-of-way easement that runs with the land, sell that right to your neighbor, and then sell the land. The buyer may not appreciate the easement, hence the value of your property goes down a bit. Your goal is to make enough on the easement sale to your neighbor that when combined with the lower value of your property (lower because of the easement), that you come out ahead, or at least no worse than break even.