I see the foundthru site currently failing to show prices. I believe I’ve seen PC pro uses transients. if transient price data has been purged, and the script is not able to fetch prices, it will fail to show prices.
It would be great if PC pro would just store prices in postmeta. It could render it server side making, also making it easier for search engines to see it (may be beneficial for SEO if combined with rich snippets markup).
Transients could still be used as an enhancement, ie it could still fetch these after page load and update prices if succesful. Pricing already rendering server side could be hidden until the ajax completes or returns an error.