What TF2 items can I sell to the Steam Community Market?

Solution 1:

Currently, you do need a premium account to sell items. The wiki also says that "In order to sell an item on the Steam Community Market, the user must buy one item on Steam per year, and then wait 30 days after purchase to begin buying or selling."

It's also limited to tradable Genuine items, Vintage items, Festive (both Unique and Strange) weapons, Botkiller weapons, Strange weapons, Unusual hats, crates, and most if not all tools.

You can see what items of your inventory can be sold by using the "Show marketable borders only" option of the backpack viewer. This also shows how much is the item selling for.

Backpack with "Show marketable borders only" selected in the middle, near the top. A Genuine item is highlighted, with the end of its tooltip saying, "(50 available on the Steam Community Market starting at 6,87€)"

Solution 2:

Genuine items, crates, keys, vintages, tools (name tag, desc tag, decal, etc.), paint, strange parts, backpack expander, festive items, manniversary package, strange botkillers, gifts, unusuals, strange festives, strangifiers, strange filters, and strange hats... think i got that down right