How can I display an object with a script based off an int in a different script?

I’m making a simple RPG for practice purposes and I want to count the number of dungeons the player beat. Based off of that number, I want to let the player buy different items.

Each item has a class where it has a public getter and setter saying how many dungeons must be beaten to display the item. How can I use a script to control all of the items that can be purchased with the int dungeonsBeaten?

Have a script that checks the dungeonBeaten int compared to the Items requiredDungeons value whenever the shop is opened and make a list of available items for purchase.

using UnityEngine;
using System.Collections;
using System.Collections.Generic;//required to use Lists

public class DungeonCountController : MonoBehaviour {
	public Item[] allItems; //Assign the items in your inspector
	public List<Item> availableItems;

	// Use this for initialization
	void Start () {
		availableItems = new List<Item> ();
	}

	public void DungeonCheck(){// call this when the shop is opened
        availableItems.Clear();
		foreach (Item item in allItems) {
			if (dungeonsBeaten >= item.requiredDungeons ) {
				availableItems.Add (item);
			}
		}
	}
}

You can then use the contents of the availableItems list to display all the items the player can buy with their current number of dungeonsBeaten.