Out of interest, have any more of these sold?

I have an unspent s2-25 I bought for 28.5 btc back in 2013 and would be interested in selling for the right price.

UK based.

Coin isn't graded because I didn't want to risk posting it but it's in good condition and been stored in a bank vault. I referenced them in a tedx talk in 2014 (photo of them is even on the youtube video).