Do you know how many are out there that still need to be redeemed?
Did you save any contact info from then sales? IIRC you were doing PayPal for some of them.
Might want to reach out to people and let them know that you are back and working on the ability to have them redeem their coins.
I could see someone having tried to redeem back in 201x or 202x and found the site down and put the coin away thinking the BTC was lost.
-Dave
I've noticed that I can't view any transactions on my PayPal account prior to 2018. I'm unsure how many are still pending redemption, but I could potentially create a script to check against my database, which contains around 500 addresses.
This past weekend, I made some progress in streamlining the process and figuring out the most efficient approach. I'll continue working on it during my free time this week.