@Nooby these take extreme precision and care to make. You have to have a really good eye and steady hand. Its hand made so each anti-vandal disc gets the extra little bit of special attention. i reckon 50 cents and its your
To be honest, last week I was looking myself stupid for something I could use to insert under the goblin! I cannot for the life of me find a suitable material / rubber. I think 50c is a fair price. However, for that price, I would like it perfectly round