This might be a steal...

[JRGSPE73]

I don't know much about A/C systems, but I saw this on Craigslist (Philadelphia) and thought it might be a good deal, so I figured I'd pass it on:

<a href="http://philadelphia.craigslist.org/tls/436853126.html">http://philadelphia.craigslist.org/tls/436853126.html</a>