Yes, today they are crazy expensive. Yet looking back 20 years that was not always so. I have one of Mark’s earlier units, the MSB Gold Full Nelson, to which i added my own power supply (plural actually) and some further fitter control (a loop on the already excellent timing source).
I believe the base price was under $500 and with all the upgrades a few hundred more. The parts for my external PS (which made a big difference BTW) cost me maybe $125.00 - plus of course lots of pencil and soldering iron time.
So Mark knows how to deliver value as well. I guess he just moved on as the market progressed. I have not heard the latest stuff under controlled circumstances, but if the past is any indication, i bet its great.
G