No offence, but listing something on Ebay after the trouble you have with the 810 borders on stupidity. You have a very good chance of being stuck with the 810 rrefund
Curious - how much did you list the 500 at?
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A Canon G5 and a bit of Nikon gear.
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Nobody paints like that anymore either. But it can't be wrong to try - Bob Dylan
Thanks TO,
Yes I am borderline stupid...

No offence has been taken, I know what you mean.
That said, I very much hope that if someone buys the lens then it will be a photographer of decent standing. All in all it would require someone with really bad intentions to "by" a professional big lens for screwing around only.
On the other hand, as my mother said when I was a young man, I am prone to be taken advantage of. It is the story of my life in a nutshell....... :-(
I listed the lens based on eBay suggestion. They see what the trend is for an item and know what it sells for. So I just left the "Buy it Now" price at the level they suggested. However, there is a best offer option available too. I'll see what happens, if none will buy the lens I am not going to cry since I still have a love affair with that lens. I may just sleep with it... ;-)
Here is the eBay link:
www.ebay.com/itm/142544791810?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649
If it does not work then just search Cameras and Photo for a 500mm Nikkor f4E FL lens.
I put this lens up on the DPReview "For Sale and Wanted" forum to with other items a while ago. Nobody bothered to ask, apart from a low balling dealer who wanted to have a "lot sale" for a quarter of any reasonable amount.
I hope that the lens will find its way to someone who actually want one original late model Nikkor 500mm and will appreciate it for what it is. I know, people will say "Sigma has abetter value". If that is the case then those folks obviously want a SIgma not a Nikkor, end of story.
Of course I am aware of the fees eBay and PayPal have, pirates and pickpockets as I described them once before. So, If it would come to a private sale outside of eBay the price would be as much less as the pickpocket's take.
Best, AIK