remove and add items dynamically?

i would like to add and change items in the item shop at every fix interval, but i wonder how would i do it?

because in the start the hero have low life about 400-600hp and as they gain level they would have around 5000-800 life in hero siege games and i got items that could heal them 3000 life however my item shops are full.

so i was wonder can i move an item from a shop by trigger and add new items in?

I believe you can do that using the "Neutral Building" item actions, as long as the building has "Is a Building" set to true and is based off of the Marketplace structure. I haven't messed with it a ton, so I'm not completely sure about the intricacies, but give it a shot.

Try this file, i tryed to do it good :)
You may change if you want the heroes to be owned by someone, then change the picked unit to Unit in rect owned by player, then choose a player or a player group.