Depending on the request, payment may fluctuate in terms of total cost. Here’s a guideline to help estimate what sort of price-range you may be looking towards:
(Standard payment is in USD, robux conversion is based on DevEx rates)
Game Thumbnail (2560x1440): $30 - $100 / R$ 8571 - R$ 28571
Game Icon (750x750): $15 - $35 / R$ 4286 - R$ 10000
Game Thumbnail + Game Icon (2560x1440, 750x750): $35 - $130 / R$ 10000 - R$ 37143
Logo Design: $25 - $45 / R$ 7143 - R$ 12857
Branding: $25 - $50 / R$ 7143 - R$ 14286