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.

I have too many games in my collection to keep track of mentally. I'd like to instantly see which games in a lot I already have so I can calculate weather or not it's worth buying a lot to get bulk games I need.

The Epoch Cassette Vision is the first Japanese exclusive video game console to feature interchangeable game cartridges. Of thirteen known games, only eleven were released.

I'm trying to collect the entire PS3 catalog and having the option to only see games I do not have in my collection would greatly increase the efficiency of searching.

Please add prices for Japanese Mega Drive games!! There are a lot of exclusives that didn't even get an European release...

Also, thanks for already adding Famicom and Super Famicom!!

They could add Pong consoles to the Other Consoles tab so you can keep track of your Pong console's value. The First Generation of gaming needs a little love too.

Adding The cartridges for the Texas Instruments TI-99/4A would be nifty .Mattels Hyperscan would be a shortlist  but might be nice as well.