As you have already found, RCBS made the Reloader Specials in several versions, most basically the same. They all work reasonably well and were/are consistant with others of simular design.
Most, if not all of them were all of the "simple toggle" lever-to-ram linkage. That means they need a considerable amount of handle pressure to size large cases.
The better design is the "compound toggle" linkage in which the lever connects to the body and ram through two swinging toggle arms. That type of linkage requires much less lever strength and is the only press design in current production, so far as I know.
Either way, you have a more than servicible press and, at the price you got it, that's a great deal! I think you will really like it for pistol stuff but won't like it quite as much for larger rifle cartridges due to the sizing force required.
I don't think the Little Dandy is any longer made either. It was a decent powder measure intended ONLY for pistol cartridges. It was not adjustable, just used interchangeable rotors with varying chamber sizes. Old rotors are occasionally listed on ebay but I believe it would be a false economy to buy many of them, rather see you purchase a new adjustable measure you can use for everything you may want to load later.
