I have two models wich I am sure I am never going to build. Two rareplanes vac's (he-51 and d-510). I bought them because I knew them from an old book ("how to gow advance plastic modelling" by C. Ellis). Since this book was the book that made my pastime into a serious hobby, I had to have these kits. They have cost me a euro each, I don't know if they are "collectable", but I like them.