I bought a new Ryobi scroll saw for $99. It will use the pinned or unpinned blades without an adaptor.
The Ryobi works fine for what I use it for, which is making scrolled "waves" for metal segments, cutting 10 inch pen tubes to custom lengths, making small wooden toys etc.
I have done some (very little) scroll saw work with this saw, and it is almost impossible to do "real" scroll saw work with it.
Having owned the Craftsman and the Ryobi, the Ryobi is a better saw than the new Craftsman in that the new Craftsman can only use pinless blades with an adapter. With the blade adapter, the Craftsman is very cumbersome to remove the blade (which is a prerequisite for actual scroll saw work. The pinned blades will not fit through the tiny holes necessary in scroll saw work).
I won't even get into the importance of left and right tilting tables, cast iron tops,etc.
The older Craftsman scroll saw (18 inch) was, in fact, made by Ryobi and was the same saw as the Ryobi 18 which will use pinless blades.
If you plan to do serious scroll saw work, you need a pinnless ONLY saw. The Dewalt is pretty much the MINIMUM saw that will work adequately. The Dewalts are about $500 new or $250 used (I see them on Craigs List and Ebay frequently).
I hope this helps.