Zoey ~ I'll try to put a breeder's view in here:
Most registered miniatures are in the AMHA or AMHR. When a horse comes along, no matter how gorgeous, and he or she is registred only WCMHR, to me, who had only A/R, there was no point in even thinking about the horse that's just WC.
If a horse is just WC, you can't breed it to an A or R horse & get a registered foal. Same with Gold Seal Registry. Having only ever bred registered, I'd have to stay away.
I'm not saying breeding or showing is for everyone, by any means. If a person just wants a mini to love, a non-registered or off-registry horse will do just fine. And probably fit the wallet better.
But if you are looking to market to breeders or those who show, sorry, for most it's a no go. The cost to buy that A or R registered horse is most likely more, but then the buyer probably intends to do more with it. The opportunity just isn't there with World Class. Not trying to be elitist, just stating facts, as I see them. Good luck with your "kids."
: - karen