What is this card worth

Niv-Mizzet, the Firemind RVR 467 $0.65 Retro frame General release Niv-Mizzet, the Firemind P30A 14 $1 Retro frame Niv-Mizzet, the Firemind C20 225 $1 Commander deck Niv-Mizzet, the Firemind GK1 26 $3 Niv-Mizzet, the Firemind A25 210 $1 Niv-Mizzet, the Firemind C17 185 $2 Commander deck Niv-Mizzet, the Firemind MM2 182 $1 - 3 Niv-Mizzet, the Firemind DDJ 1 $1 Niv-Mizzet, the Firemind PRM PRM 32583 No price yet Niv-Mizzet, the Firemind DRB 11 $9 Niv-Mizzet, the Firemind PCMP PCMP 2 $126 Niv-Mizzet, the Firemind GPT 123 $2 - 14