NeoArkadia# of People - Good
10,000 - 50 Gems
30,000 - Dark Magician Card Protector (i.e. Sleeve)
50,000 - Additional 50 Gems
100,000 - Yugi Muto Duel Field (i.e. Mat)
200,000 - Blue-Eyes White Dragon Card Protector (i.e. Sleeve)
250,000 - Additional 100 Gems
300,000 - Seto Kaiba Duel Field (i.e. Mat)
Source
10,000 - 50 Gems
30,000 - Dark Magician Card Protector (i.e. Sleeve)
50,000 - Additional 50 Gems
100,000 - Yugi Muto Duel Field (i.e. Mat)
200,000 - Blue-Eyes White Dragon Card Protector (i.e. Sleeve)
250,000 - Additional 100 Gems
300,000 - Seto Kaiba Duel Field (i.e. Mat)
Source