We sold our old N64 console a couple weeks back. We hoped to basically get it out of the house without losing money. So we set it out for 50€, including about 13 games (including two Zeldas and two Banjo Kazooies).
When a guy responded to take it for the 50, we happily agreed.
Only afterwards, when the offers for 200+€ arrived, we realized that we had sold that thing way under worth. Turns out, the Zelda games and the Banjo Kazooie games would have been worth 100€ together.
So folks: Never sell your retro gaming console under worth. These things are plated in gold.