I didn't buy all of them, but I have a boxed copy of all the versions of Red Hat from 3.0.3 until 6.0, plus a few scattered versions since. In January, I bought a discounted copy of Red Hat 7.1 Professional from the Pitt bookstore for $50. It came with 10 RHN 3 month trials which worked with 8.0. Seemed like a good deal to me. -james