Teddy Pardo offers 14 days with return free shipping. So you don't need to sell it off, just return it within 14 days if not 100% happy.

The Teddy Pardo 12V/4A PSU was 420$ incl shipping within EU when I ordered one.

But I bet the MS200 don't need that powerful PSU so you could get away with a much smaller one.

DSP8000SE, DSP7200SEHC, DSP5200SE sides, DSP7200SE rears, 861v8, 210, Sim2 Ultranero 4, Stewart Cinecurve 2.35:1, XEIT CM-5E Anamorphic lens, Dune HD Duo Cinema 8K and Wireworld Platinum 48G HDMI -> UHD722 -> Shunyata Omega Ethernet. Shunyata/Furutech power-cables/filters. SR Master Fuse@861v8. Uptone Etherregen with 10MHz OCXO clock.