Non plural - XX,XXX
Plural - Low XXX
Ponys in king fetched $2k. The proper spelling (ponies) as you said would be the one. If ponies for the ORG, I'd view it as a X,XXX domain. As for the improper spelling, I reckon you've got to aim for the Low XXX side, IMO...sold to a buyer that appreciates it. Hope you catch a bid