Make sure you choose someone that doesn't have any controversy or negative trust in their past.
Here's a list of well known and verified escrow providers on this forum: https://bitcointalksearch.org/topic/list-bitcointalks-escrow-providers-ranking-blacklist-avoid-scam-276897
Using escrow on this forum is a very tightly controlled business, it's practically regulated. The community won't let new members offer escrow services very easily (I know because I've tried and been denied and ridiculed for even thinking about it). While that may be bad for competition and fees it's good for maintaining security for the buyer and seller in the transaction.
Thanks. My coins are ungraded, but kept have been kept in safe deposit box for years. I'm the original buyer from Mike in 2011. One Error coin and one of the very first, and only, 2011 Series 2s. Thinking of selling them as a pair, but not sure where to price? Pretty 6 BTC for both? More?? Thoughts? Thks.
Ungraded, you would be very lucky to get 6. (top graded also would be a stretch for 6). Feel free to drop me a PM with pics, I can have a look and see what I think you could get based on condition