How to make a hero cost items?

[L33T-ViV]

Hello again guys...
How to make a hero cost a item, in the hero vendor ?

 

[M4stah]

You could make a trigger that check if the buying unit has the item, and if not remove the item, refund it and make sure the item has no cooldown in the shop.

EDIT:You could make a fake required research, and when a unit aquires the item, set its level to 1 trough triggers.(When it drops it set it to 0 again)

 

[L33T-ViV]

Huh? don't really understand?

 

[M4stah]

Event- A unit is sold
Condition- (Triggerering unit) has *your item-type here* equal to false
Actions- Unit- Remove (triggering unit)
Player- Add (Costs of your hero) gold to (Owner of (Buying unit))

 

[L33T-ViV]

No event " a unit is sold " ?