I have a pair of Koflach Arctis Expe plastic double mountaineering boots in good condition, men's size 8. They are used with some scuffs and the lacings of the liners are a little worn, but otherwise they are in great shape and they are 100% functional. These are super durable and very warm, and the removable liners allow you to take them out of the boot and keep them in your sleeping bag with you overnight so you don't have to put on freezing cold boots in the morning. The soft flexible plastic outer shell will not freeze or become stiff in cold temperatures and helps keep your feet dry. I'll throw in green superfeet insoles as an extra. Retail $429, not including superfeet.