Help with Corrupted Manifold Paradox!

[*A]

So I got this item from a friend paying me back and its worth like 35$ on the market, I have a couple questions since I don't own or ever played Dota 2.

1. What is this item?
2. Why is cheapest listing at 35$ but one sold for 69$ today? Is there a difference between each one?
3. I want to trade it for CSGO skins, where do I do that?
4. Should I quicksell it for 27$ or just list for 35$? How long does it take to sell this item? Is it popular?
5. Give me more info about anything you feel like.

[ナルゴ]

1. It is a $35 cosmetic item for a character in a game called DOTA 2.
http://www.dota2.com/store/itemdetails/20684

2. Because of collectors or it has styles unlocked.

3. Trading sub-forum or some other 3rd party trading site.

4. List it at slightly below store price for a guaranteed sell.

5. Prefixes like "Corrupted", "Inscribed", "Genuine", "Auspicious" don't mean anything. Literally no different from the default item that is available at the official store.

This item has 3 styles. The more styles it has unlocked, the more valuable it is.