title: Regular expression to match $price
body: <p>I am in need of a regular expression which matches price like:
  $200, $143.</p>
  
  <p>So the requirements are, there should be spaces before and after the price like: ... $130 ...</p>
  
  <p>and there should be a dollar sign "$" before the digits.</p>
  
  <p>Help please.</p>
  
  <p>P.S. I am using Python</p>