I second (third?) Sunil and Theo.

If the neighbor NEEDS to cull bass from his pond, then even if only a few bass thrive in your pond it should still be a big benefit.

You will have a few "bonus" large bass to catch in the pond in a few years, and the large bass will eat into a couple of the size classes of the abundant smaller bass. That should result in your pond having a much wider distribution of bass in each size class, which should make it a much healthier bass fishery.