I've added support for ZX Spectrum games now.  There are no games added yet, I will let users decide which games are the most import to track because the database is very large and I'm not personally familiar with the system.

https://www.pricecharting.com/console/zx-spectrum

Any contributor can add games here:

https://www.pricecharting.com/add-product

If someone is interested in sending me a spreadsheet with a bunch of games to add in bulk, let me know.  I would just need a list of the games in a spreadsheet.

Good suggestion.  Do you know of any good databases of all the figures?

Thank you.  I've gone through and moved a bunch of those N64 sales to the correct items or deleted them.  I also added some backend code to automatically move those N64 sales for particular colors into the correct item, even if the seller listed the item incorrectly.  I also manually added some additional sales.  

Can you give me some example sales that you reported but they were not removed?  I want to look into those and see why they were not removed and reviewed by admin.  Thank you

Can you elaborate a bit more?  I don't quite understand.  What variants?  And where do you want me to put them?

Added now.

https://www.pricecharting.com/game/atari-2600/activision-decathlon

I've added this now.

https://www.pricecharting.com/game/jp-nintendo-ds/subarashiki-kono-sekai

That was added to Amiga CD32.

https://www.pricecharting.com/game/amiga-cd32/microcosm

You can add these games now.

https://www.pricecharting.com/console/tiger-r-zone

I've fixed as many of these as I could identify.