This auction has me puzzled.
Blue LED power indicator, cool.
S-Video output, cool (... if you don't have an RGB monitor).
Switch Mode Power Supply, well... I can't imagine the Genesis uses enough power to justify this mod (or am I wrong?), but at least the reasoning is sane.
And then comes the weird part:
Maybe if you lived on top of a subway and you didn't want the cartridge to move in the connector and make your Genesis 3 reset randomly when the trains drove by. But then I don't think a plate (of obsidian?) and some cones would cut it.
This must be the most useless, braindead "mod" I have ever seen