Steve,
I wouldn't have thought it would make much difference.The piece in question cannot be seen from the farm and to be honest it's that small we didn't even know it was ours,it's useless except to our 'new best friend',as I say,we still own the land apparently but he has the right to use it so a future purchaser would still buy it but would have to honour the agreement.The land hasn't even got a tree on it.

(P.S. What's the plural of cactus)