[WTS/WTT] Account with CS:GO, Karambit Night FT, Thief, GTA IV, L4D2 TRADEBANNED

Hello, I have a steam account with the following games:

CS:GO
CS 1.6
CS:S
Theif
Sleeping Dogs
GTA IV
Left 4 Dead 2

In my inventory I have many items like:

Karambit Night Field Tested
M4A1-S Nitro Factory New
Ak Redline Field Tested
AWP Redline Field Tested

Many dota 2 items: compendium, 2 invoker sets.

The problem is the account is trade banned, but you can still buy items from games stores, like licenses from Steam Store or items from Dota 2 Store. You can't trade items or buy items from Steam Market.

I am looking to get $100 or something like this, but I also prefer to trade it for CS:GO items like knives.

 

Just a question .. how long does the trade ban last ? I mean if it's like forever why should someone pay 100$ then for items he can't trade.