As I need to make room and generate funds for further puzzle purchases, I decided to let go part of my collection.
This is Pennytentiary made by Eric Fuller. Mint condition. Stored in a smoke-free home under humidity-controlled conditions. Original box and instruction sheet included.
Original description:
https://cubicdissection.com/products/pennytentiary
Buyer to pay shipping&handling fee, to be determined at the end of auction. Paypal transfer via F&F preferred.