Richard made many more than 4. Now if it has a steel joint and is a jump break, then 4 is probably closer to the truth. I have seen at least a dozen jump breaks from Richard. He quit making them many years ago and doesn't have any plans of ever making another one. As far as decent value, a good condition used one similar to the one in your picture that is straight, has original ferrules with a wrap would probably be around $850-$1000. Anything under $700 and you probably got a great deal.
Kelly