What is this card worth

Niv-Mizzet, Parun SLD 1530 $19 Borderless Niv-Mizzet, Parun OTC 235 $6 Commander deck Niv-Mizzet, Parun RVR 207 $6 - 8 Niv-Mizzet, Parun RVR 376z $0.75 Serialized Serialized Niv-Mizzet, Parun RVR 376 $6 - 9 Retro frame Booster Fun Niv-Mizzet, Parun RVR 438 $11 - 29 Borderless Booster Fun Niv-Mizzet, Parun CLB 851 $5 Niv-Mizzet, Parun PLST GRN-192 $7 The List Niv-Mizzet, Parun GRN 192 $5 - 9 Niv-Mizzet, Parun PGRN 192p $7 - 11 Promo Pack Niv-Mizzet, Parun PGRN 192s $9 Prerelease