Am ready to try a Dillon Square Deal B progressive. I found a used one online which includes the press set up for 45acp, and extra tool head, 3-4 extra pick up tubes, Dillon primer flip tray and extra parts kit for $365 shipped. The same new from Dillon would be $531 shipped. All things considered, would you buy used, or start off brand new? 45acp isn't my first choice, but with the extra tool head, I could order another set of dies. But, would I also need to order the small primer assembly? Any help appreciated.