Since there's a lot more cross-trading done now between CSGO and TF2, I think it would be helpful to a lot of users if they were able to input an "Any CSGO Key" option, into their trade slots.

In CSGO most of the keys are actively used in trading. To include each individual CSGO key in a cross-trade, would not leave enough room for the other necessary TF2 items such ask Keys,Earbuds, Max Heads, Offers, etc.

In TF2 most of the trades are done with regular Mann Co keys so it may not benefit much from having it's own "Any Key" option.

I believe implementing this will make cross-trading a lot more efficient, or even just CSGO trading.

I'm aware of the rejected suggestion for "Random Key" but i'm not sure if it is the same suggestion as this, since "Random Key" could mean any key between TF2, Dota 2 or CSGO. This suggestion is specifically for CSGO keys only. Sorry if it's considered a re-suggest.