Yes, my Mis-struck British coins are gone. In the process, I learned a lot.
Suggestions -
Think twice about selling a life-long collection. You will miss it, as I already do.
Other thoughts -
a. Don't sell your collection through someone who knows little or nothing about your area of specialization (like Spink's NY coin representative at that time).
b. Don't be talked out of setting Reserve prices. When they tell you that non-selling coins will cost you a percentage of the Reserve price, negotiate.
c. I had thought that my hundreds of error coins would be offered in a single Spink catalog auction, with my name highlighted. I would be famous <g>. Wrong! Though I had submitted hundreds of coins, the collection actually appeared in the middle of items as diverse as Columbian Exposition Medals, World Stocks and Bonds, and much more. One had to look hard to find the coin errors, which began at catalog number 162.
d. Many major error coins of smaller denominations (farthings, halfpennies, and even Maundy pieces), were sold in lots, with poor descriptions and no pictures.
e. The auction was not well publicized. Apparently, only those on the Spink mailing list or collectors living in the New Your City area, heard of it. (Within weeks, a small new York coin dealer began offering my coins on
ebay at multiples of the auction selling prices).
(In my case, they didn't even want to list the dramatically mis-struck Conders or GunMoney because, their NY coin expert said, everyone knows there was little or no quality control involved in their manufacture.

(These were returned to me).
What might I have done? Well, I'm thinking now that to pass the collection along to my heirs might have been the way to go.
Cheers,
Bill