Guides
Real authentication guides for NES, SNES, N64, and Game Boy collectors. PCB inspection, label tells, battery testing.
Why this page exists
Reproduction cartridges are not inherently dishonest — playing a classic game is valid regardless of cart format. The problem is when reproductions are sold as originals at original prices. A working repro Pokemon Red is worth $5–$15. A verified original in good label condition is worth $20–$40. A sealed original CIB is a different market entirely.
The knowledge to tell the difference is real and teachable. PCB markings, chip date codes, label printing quality, screw types — these are physical facts you can learn to read. This page teaches them plainly.
Retro games worth searching on eBay
Established titles with active collector markets and documented authentication profiles. We earn a small commission on qualifying sales; your price is unchanged. Full disclosure.
Nintendo NES games lot
Lot buying reduces per-cart cost. Check photos for Seal of Quality label condition. High reproduction rate in valuable titles (Mega Man, Castlevania, Duck Tales).
Super Nintendo SNES game
PCB inspection is the definitive test. Rare titles (Earthbound, Chrono Trigger, Harvest Moon) have high repro rates and command large premiums for originals.
Nintendo 64 cartridge
N64 uses 3.8mm security bit screws. Check chip date codes for production consistency. Repros exist for rare titles (Bomberman 64 Second Attack, ClayFighter Sculptor's Cut).
Game Boy Pokemon game
Highest repro rate in the Game Boy library. Test battery health before buying save-state-dependent games. Gold and Silver fake rate is extremely high.
Sega Genesis cartridge
Lower repro rate than Nintendo titles overall. Standard Torx screws — easy to open and verify. Region lock is a consideration for Japan imports.