I have a Grivel Boulder Mat for sale. It's never actually been used outdoors. Believe it or not, I bought it as a dog bed for the dog but he passed away a bit ago, so it's never been fallen on, jumped on, or owt. Just been slept on a bit by the dog so good condition, just the yellow fabric is a bit dirty (from the dogs paws), but otherwise in great condition.
Live on a narrowboat and I don't boulder so want the space back.