How to make a profit on dota 2 trade for newbies

Making a profit on dota 2 is similar to scrapbanking method of team fortress 2.
Here instead of scrap we use the equipment itself.

The best way earn a profit is do do 1:2(random) same rarity trade.


Say for example Mr.A is looking for a juggernaut common sword to complete his set, and Mr.B has the juggernaut common sword and wants to trade it


So Mr.A gives  Mr.B two random common item for his juggernaut sword.
i.e   ===>    2 random common item:juggernaut sword

• Always Remember Mr.B can't choose a specific item from Mr.A,it always has to be random,else no profit can be made

If Mr.B wants to choose a specific item from Mr.A's inventory,then the trade has to be 1:1 same rarity trade and not 1:2(random item) same rarity.