public ShopInventoryEntry(ShipPartType shipPartType, ShipPartAvailability shipPartAvailability, ItemVariety itemVariety)
{
this.shipPartType = shipPartType;
this.itemVariety = itemVariety;
this.availability = shipPartAvailability;
id = shipPartType.ToString() + " " + shipPartAvailability.ToString() + " " + itemVariety.ToString();
}
