Why would you feel bad about that linking to a prior post? If you put in the effort to provide new or interesting information when you first posted the coin, newer members have the opportunity to see it . I think it is a sensible way to keep track of things.
Heh, yeah... I was just kidding. IMHO, many older threads here have a wealth of great information in them, particularly for newer members and collectors, and I link to them whenever I remember one of them and it's pertinent to new thread or request for info.