Sharon
The Total Aggregate Production run on your lens is ~ 97560 units
Thus your lens is approximately in the last 10423 units made (297560-287137)...
Or the final 11% if the production run...
While this is definitely in it's favor, there are so many other parameters in the mix here.
BTW; The fact you're the original owner ranks high on my personal assessment of worth/value...
I've had excellent results (luck?) purchasing previously own kit from original owners.
And is (in my humble estimation) a very good thing.
On the down side, I'm no longer keen on purchasing Silent Wave optics...
They sadly have a higher failure rate compared to AF-D optics (which were produced during Nikon's Golden Era). For validation of the aforementioned check out Roberts' (UsePhotoPro) and KEH who consistently advertised failed AF-S optics (As Is) parts only.
I lusted after the AF-S 70-200mm f/4G IF ED VR for years until several colleagues assured me that it's not if but when it's Silent Wave motor fails... Same is true with the optically excellent AF-S 80-200mm f/2.8D Nikkor
But please don't take my word here... Trust Robert's instead, they are a very reliable vendor.
https://usedphotopro.com/nikon-nikkor-af-s-80-200mm-f28-ed-d-if-lens-afs-una-07-8880-6-217126-85d81aa4That said I have a colleague who shoots outdoor league sports with the exact same version of the 80-400mm as yours and his work is absolutely stunning... He loves this lens, which he has used successfully for many years.
Hope this helps Sharon and Dale...
All the best on your photographic journeys
Sharon br br The Total Aggregate Production run ... (