We don't have a filter by what I'm missing feature, but you can look through a list by console and visually see which you don't have by looking at the orange vs blue buttons.
For example:
https://www.pricecharting.com/console/nes
You look at the orange vs blue colors on the right side for each NES item. Blue means you don't have it, orange means you do.
Customer support service by UserEcho
Ideas
We don't have a filter by what I'm missing feature, but you can look through a list by console and visually see which you don't have by looking at the orange vs blue buttons.
For example:
https://www.pricecharting.com/console/nes
You look at the orange vs blue colors on the right side for each NES item. Blue means you don't have it, orange means you do.