How to instantly sell all my Steam items to the highest buyer of that item?

[Toto]

I use SIH (Steam Inventory Helper) to list my Trading Cards on the market, I see that there is a Instant sell button on that tool when pressing on a item but could it be possible to select multiple items to instantly sell? Or is there another tool? Thanks for reading

[Silicon Vampire]

Inquire with the makers of this "tool" you are talking about. This has nothing to do with Steam, Valve or these forums.