I have one and SWE1 kit. RFM is definitely fun and entertaining to play. Fan layout like is older brother AFM. Its weird with the display on the playfield but I think it works for what they were trying to achieve. SWE1 is meh but a guilty pleasure I guess.

Pros and cons to a monitor vs LSD screen with contrast (black levels) but LCDs will be brighter, crisper and make the cabinet overall lighter to wrangle. Price wise that's what they seem to be going for in decent cosmetic shape. Besides the monitor the other troublesome thing I'd be wary if the person selling did any CPU work with replacing the old swollen capacitors after 20 years. Not too difficult to do but you have to be decent at soldering or better yet have a soldering station.