| Сообщение от firsmember | 
	| тоже самое только на jQuery ? | 
	
 
 
<!DOCTYPE html>
<html>
<head>
    <title>Untitled</title>
    <meta charset="utf-8">
    <style type="text/css">
        div>.price-hidden-items {
            border: 1px red solid;
        }
    </style>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
    <script>
        $(function() {
            $("div > .price-section__list:nth-child(6)").each((_, e) => {
                $(e).nextAll().add(e).wrapAll("<div class='price-hidden-items'></div>")
            })
        });
    </script>
</head>
<body>
    <div id="blblblb1">
        <div class="price-section__list">
            <div class="price-item">1</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">2</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">3</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">4</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">5</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">6</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">7</div>
        </div>
    </div>
    <div id="blblblb2">
        <div class="price-section__list">
            <div class="price-item">1</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">2</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">3</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">4</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">5</div>
        </div>
        <div class="price-section__list">
            <div class="price-item">6</div>
        </div>
    </div>
</body>
</html>