Site is pretty good by the way; whilst I am sending an email, I would like to share that.I love how we can tweak, correct, etc. it’s a really good idea. 
I would like to suggest adding Golf Trading Card sets. I have been buying/selliing quite the volume. It was surprising how it was not previously suggested. If there is anything I can do to help contribute to that suggestion coming to fruition, I would happily help.

Turko’s Trading Cards

Why are there so many third-party items listed under GameCube - Controllers (Hip Gear, Intec, Mad Catz…) ? I thought this website didn't track third-party products unless they're particularly valuable? What's more, most of these third-party controllers have absolutely no sales data associated with them, which make these entries pretty much useless for price charting…

On a related note, I have been wondering why the different colored controllers aren't considered variants of the same item? They do have the same model number after all (DOL-003). I would expect them to be named something like: 

GameCube Controller [Jet Black];

GameCube Controller [Spice Orange];

GameCube Controller [Indigo / Clear];

etc.

These two items are one and the same and I believe the corresponding database entries should be merged.

Thank you.

Under CIB, there is a 2021-07-23 sale for a third party (Carby) cable.

The sale is too old to be reported the usual way. Thanks.

It would be nice to pull up a grid style image set of your trading cards or comic covers, to help with finding variants of things you need. Or to make reference to item you want or want to sell.

The only sale listed under "Box Only" for black OEM GameCube controllers is too old to be reported the usual way, but judging by the title of the listing ("[…] With New Thumb Pads"), it is obvious that the item advertised is not a box. Thanks as always for fixing this.

There are currently two different entries for orange GameCube controllers in the database: "Orange Nintendo Brand Controller" for NA GameCube and "Spice Orange GameCube Controller" for JP GameCube.

The thing is all GameCube controllers are "Spice Orange" and there are no region-specific GameCube controllers. I believe the two entries should be combined into one. Thank you.

It might be useful to have, for each product, a line of text listing what is required for the item to be considered CIB. I'm thinking of something simple such as "CIB: Disc, box, manual, figurine, map." This feature would be particularly useful when reviewing questionable sales of unfamiliar products.

As CGC is getting more recognition and market share, it would helpful to be able to see their prices on the main pricing graph along with PSA and BCS. They're coming on strong and becoming the grader of choice for a lot of scenarios.