I was looking for previous sales and I found this post [
https://bitcointalk.org/index.php?topic=214589.0 ] that has a table. The multiplier there is 2.33 for an ANACS MS-65 brass error coin. However, that was before bitcoin cash which at face value should be good for at least .1 based on today's prices.
I would rather just hold on to the error coin for 1.6BTC. However, I have a non-error coin MS-65 I would sell for 1.6BTC.
I suppose that 2.5BTC would be the minimum bid that I would consider selling it for.
That is very old information and multipliers aren't relevant. I would try looking for recent sales, and even then you have to set your expectations lower since BTC has climbed rapidly recently.
You are correct it is old, but the multiplier was actually 8.0 for the error coin and 2.3 for the non error coin.
Either way the minimum bid is 2.5BTC.
Thank you everyone for the comments. The opinions have been posted and point has been made.
Now, either bid or do not.