I have repaired may, many metal manual focus lenses but I'm not looking forward to repairing plastic AF lenses, so I wanted to buy new lenses with Nikon USA warranty.
Having written that, I was able to source a 24 2.8D very reasonable from e-bay from a non-dealer that sold it still in its box with papers. Claimed to only have used it once or twice and it appears he was telling the truth. It did have the correct warranty card with stamped US serial number, but realistically the warranty is not transferrable to myself.