Have lots of items, can't sell them?

[kmi]

Hi, i have lots of items in my inventory, but i cant put them on an auction in the market. Whats wrong with the market? I had some items sold when market first opened, but there were only few items i could sell. I checked the market after two weeks and i could sell even more items, but now for 4 weeks there weren't any items available for the auction in my inventory. What can i do to sell all the items i have left?

[Spirit of the Walrus]

Not everything is eligible to be sold on the market. You will only see the items they they allow to be listed.

[girdurloins]

I'm thinking about putting some crates up for sale and I was wondering the same thing so I went here for information.
https://support.steampowered.com/kb_article.php?ref=6088-UDXM-7214

[kmi]

Why don't I see all of my items when I try to sell something?


When selecting an item to sell on the Community Market, only items that are eligible to be sold will be visible and selectable.

Thats interesting, i have some items like 3 or 4 times in my inventory, some of them could be sold, others cant be sold? I dont get it. Why dont they let me sell all or nothing?