The problem occurs is the following: After relative positioning an element with CSS I get a white-space of where the element was... I don't want the white-space!

    .thetext 
    {
        width:400px;
        background:yellow;
        border: 1px dashed red;
        margin:50px;
        padding:5px;
        font-weight:bold;
    }
    .whiteblob
    {
        position:relative;
        top:-140px;
        left:70px;
        width:200px;
        height:50px;
        border: 4px solid green;
        background:white;
        font-size:2.5em;
        color:red;
        
    }
    .footerallowedwhitespaceinblue
    {
        height:10px;
        background-color:blue;
    }
    .footer
    {
        background-color:grey;
        height:200px;
    }
<div class="thetext"><script type="text/javascript">for(c=0;c<50;c++){document.write("Lorem ipsum dolor est, ");}</script>
    </div>
    <div class="whiteblob">
        &nbsp;buy this!
    </div>
    <div class="footerallowedwhitespaceinblue">
    </div>
    <div class="footer">
        The whitespace above is way to big! The buy this still takes up space whilst it is moved.
    </div>

JSFiddle: http://jsfiddle.net/qqXQn/

As you can see in the example, the only whitespace I want is the whitespace caused by the thetext block by the margin of 50px; and the spacing by the footerallowedwhitespaceinblue(made blue so it's visible). The problem is... the whitespace is too big now because the "buy this" div still takes up space after it's been

css layout whitespace
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