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if(!empty($arParams["OFFERS_CART_PROPERTIES"]))
            {
               $product_properties = CIBlockPriceTools::GetOfferProperties(
                  $productID,
                  $arParams["IBLOCK_ID"],
                  $arParams["OFFERS_CART_PROPERTIES"]            
               );
                }

$product_properties = CIBlockPriceTools::CheckProductProperties(
                  $arParams["IBLOCK_ID"],
                  $productID,
                  $arParams["PRODUCT_PROPERTIES"],
                  $_POST[$arParams["PRODUCT_PROPS_VARIABLE"]]   

if(!$strError && Add2BasketByProductID($productID, $QUANTITY, $product_properties))
         {
            if ($action == "BUY")
               LocalRedirect($arParams["BASKET_URL"]);
         
         }