All I can say is that the possibility of resale through the NeoStore has been discussed by an owner. In speculation, I’d be impressed if the per game value of either Euro or Doggie PS2 AES matched or exceeded that of non-SNK release Japanese
Bang Bang Busters (recently sold for $3860, 100 piece production, only 2 years old).
I highly doubt that there are any owners that know for certain that their copy is SNK authentic, only owners that are patiently hoping that the promised proof will be provided sometime in the very near future. The longer it takes for the source to find this proof, the less optimistic we become.
I get the impression that refunds for these new releases will never be an option. The primary motivation to provide a refund is for preserving business/public relations. But perhaps it’s more complicated for this venture. Providing a refund probably requires the cooperation of multiple parties (a minimum of TonK + source), and neither would want to buyback a product that will likely never fetch its original sale price (the exception being Zimbabwe-style inflation).