Your comments

Depends on how many people ask for it.  If only two people want it, then we probably can't justify the development to add that to the site.  Not worth the time or cost compared to other features that users want.  But if this turns out to be popular than we can add it sooner and it will happen.  Sorry I can't give a definitive answer.  That is why we have the request tool so I can prioritize these things.

Can you give me some examples of these figures?  Links to them so I can lookup more info.

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.

Thanks for the feedback @anonymous .  We strive to track the prices for every game and track every sale for an item on ebay.  We sometimes miss some because they sell quickly, ebay doesn't include it in their API, or something else.  We have tools available for users to let us know about any missing sales.

https://www.pricecharting.com/ebay/add-new-listings

We also have multiple methods in place to find those sales too.  

I'm sorry if you felt the data wasn't as accurate as you like, but please give me concrete examples where the price is wrong and I will work to address those.

We are definitely not trying to manipulate the prices.  We are as transparent as possible with the sales data we have and the price that was calculated based on that sales data.  

@Jesse - Thank you for defending the site and glad you like it.  I'll look into that Homebrew issue you mentioned a bit more.  Those are a bit divisive in the community because some people love them and want to add them to their collections, but other users just want the old stuff.  The volume on the homebrew stuff is lower too, so the price accuracy is lower as well.