"Surrounding owners may sell to someone who wants to make a deal."

🙂

Neighboring owners might buy it, or sell theirs to him so he has some contiguous parcel. Or, you can lease it for a cell tower or water tank or electrical substation = it has value. Or, you donate it to a public entity, such as State or County Park, and they can force an access right.

Land is only worthless if it no longer exists, such as slumped into the ocean.