Quantity   Component name
1 × Gameboy Classic (DMG-01) shell with buttons +/- $12 on eBay
1 × Additional Gameboy A/B buttons +/- $4 on eBay
1 × Rubber pads for the additional buttons +/- $1 on eBay
1 × Gameboy DMG-01 4 button PCB DIY Pi Zero (controller PCB) +/- $6 on eBay
1 × Pi Zero W (with essentials if you never bought one before) +/- $20 (or $12 without essentials)
1 × 3.2 Inch TFT LCD Display Module Touch Screen For Raspberry Pi B+ B A+ +/- $15 on eBay
1 × Mini DC 5V Audio Module LCD PAM8403 Class-D Amplifier Board +/- $1 on eBay
1 × 5V Powerbank 2200 mAh (Trust Urban Ultra Thin) +/- $18
1 × Gameboy speaker +/- $4
1 × Wires and switches
1 × 3D printed screen bevel