What is this card worth

Nicol Bolas, Dragon-God RVR 205 $35 - 39 Nicol Bolas, Dragon-God SLD 1246 $40 Borderless Nicol Bolas, Dragon-God SLD 522 $31 Secret Lair Nicol Bolas, Dragon-God PS19 207 $83 Borderless Convention Nicol Bolas, Dragon-God PRM PRM 78015 No price yet Nicol Bolas, Dragon-God PRM PRM 72281 No price yet Nicol Bolas, Dragon-God MED WS6 $98 Borderless Nicol Bolas, Dragon-God PWAR 207p $21 Promo Pack Nicol Bolas, Dragon-God PWAR 207s $22 Prerelease Nicol Bolas, Dragon-God WAR 207 $20 - 33 Nicol Bolas, Dragon-God WAR 207★ $13 - 41 Nicol Bolas, Dragon-God PWAR 207s★ $230 Prerelease