title: WordPress PHP - How do I sort category/archive results by a specific "meta_key" value?
body: <p>I previously made a post here:  <a href="https://stackoverflow.com/questions/4664814/how-do-i-sort-by-a-custom-field-without-manually-creating-a-new-page">How do I sort by a custom field without manually creating a new page?</a></p>
  
  <p>However, I believe I asked the wrong question (and I may still be asking the wrong question).  Actually think I may need a complex query that will display posts ordered by a meta value.   The site is using a theme called "AgentPress".  I believe passing params via the URL bar may be too simplistic for what I need.  </p>
  
  <p>Honestly I like the way the current category pages display (formatting, etc.), I simply need to "short-circuit" the process so that any category/archive page is sorted by the meta_key for the "property price" as opposed to the date of entry.  If there is a simple, more "WordPress-y" mechanism for doing this, I'm all ears. Please be explicit about where to place the code, etc.</p>
  
  <p>FYI, at this point it's clear that passing "order=ASC" and "order=DESC" in the URL works.  However, it seems that nothing I do with "meta_key" or anything related has <em>any</em> effect.</p>
  
  <p>Thanks in advance.</p>