Since shipping costs are determined by the seller, I feel that there are a lot of times where there are items are seemingly sold at a lower price but once you factor in shipping, the total cost is more in line with the market. I believe shipping is something most people consider when buying a game and therefore, it would be great if it could be included as a column in the historical list prices.

Is a price list coming

I was looking around the website, and I noticed something: this websute diesnt have (much or any, im not 100% sure) educational games and consoles. I see this quite a lot that people overlook these kinds of consoles and games, which i understand, but I also think they should be listed here. There might be things like sega pico (i havent checked yet) but im talking things like leapfrog consoles (a.k.a leapster, leappad) especially since they have games like sonic on them, and u think that probably many collectors wish they could add these to their online collection so they can display them along with checking their prices. 

The game Pokémon Rumble U had some NFC figurines like Skylanders and amiibos, which were actually created before amiibos, yet are not listed on this site. I would love it if they were on the site. Would make it way easier to buy/sell some to others!

It'd be nice to be able to see what's increasing/decreasing in value as a sort option in my personal collection.

I dont like receiving notifications for every game on my wanted list because most notifications are for over priced games. I have an extensive collection and I'm looking for very specific titles at a discount from ebay or the marketplace. Currently I get 60+ emails a day and 99% of them are overpriced games. Currently I find myself ignoring all notifications and I'm about to turn them off because they are not useful in their current state unless I'm willing to pay any price for a game. This will also alleviate the need to keep the game sniper page open 24/7 for blind deals that are irrelevant for what a collector needs.

Similar to how the stock market works, you can pull up a game and see what its daily Gain/Loss is, see https://www.investing.com/equities/top-stock-gainers

other features like ATH (All Time High) ATL(All Time Low) would be cool too.

The cost basis is recorded for each item.  Keep track of the total cost basis like you do for the total value and total game count.  Keep this value private though like other cost basis info.