var confProductsIDs =[2358,2355,2350,2334,2333,2331,2320] ;


var priceHTMlDOMs = document.querySelectorAll(".column.main .product-item");
for (var i = 0; i < priceHTMlDOMs.length; i++) {
  if(confProductsIDs.find(elm => elm == priceHTMlDOMs[i].querySelector(".price-box.price-final_price").getAttribute("data-product-id"))){
   if(!priceHTMlDOMs[i].querySelector(".price-including-tax .price").classList.contains("confPrice")){
   priceHTMlDOMs[i].querySelector(".price-including-tax .price").classList.add("confPrice");
   priceHTMlDOMs[i].querySelector(".price-excluding-tax .price").classList.add("confPrice");
   priceHTMlDOMs[i].querySelector(".price-including-tax .price").insertAdjacentHTML("afterbegin","od ");
   priceHTMlDOMs[i].querySelector(".price-excluding-tax .price").insertAdjacentHTML("afterbegin","od ");
   }
  }
}