ALL Randall knives can be used but since they are considered a collectible most do that. Since it takes 4-5 years to get a Randall made that is why most are safe queens.
Agree 100% with Knife Lady, but you can get them quicker for a little more money. Check out AG Russell's website. In the past, they've been able to get pretty much all of the Randall models fairly quickly. It just costs a bit more money.