How is this different from a neo geo 161-in-1? Yeah... it´s a bootleg that plays on original hardware.
I sold one such multicart here and nobody complained.
I think the rules either aren´t quite clear about this or they just aren´t enforced at all.
Maybe the problem is the scumbags who make these bootlegs getting money from selling games they have no right to sell?
But they of course get no money from people re-selling their used boards so I don´t really get it.
What I think *should* be forbidden is to sell a bootleg while trying to pass it off as a genuine game. Otherwise I´m not so sure. Anyways for this board there can be no confusion as there never was an official 18-in-1 from Capcom, therefore of course the only versions of cps1 and 2 multicarts are bootlegs.
as for selling this for such an inflated price, should there be a punishment for that? Yes, you can punish the sellers high price by not buying it

The price will come down if it doesn´t sell and if it does sell then the price was right.