Whenever possible we do include the price in the search results. However, our results come from Google and Bing, and most of the time those search engines don't actually include the price in the results they return to us, so we have nothing to display.
However, we do also offer an alternate way of searching, which we call Direct Results. It directly opens the actual craigslist results pages for each city you're searching, so you will see the price and everything else. (The tradeoff is that it takes a bit longer to go through the results if you're searching a large area.) You can learn more about Direct Results here: http://support.searchtempest.com/#directresults