Has anyone ever used a mug chiller like they would a chest freezer to serve cornies from? They seem like they are about the same thing, but I have no experience with them having never been a bartender. The reason I ask is because I see them on sale on craigslist from time to time. Right now I see the 36" one on the link below for $650. Is that a deal, and could I make it work? http://www.kclcutsheets.com/PDF/PC/rc_fr_series_0206.pdf