Is buying a used wine-fridge on Craigslist a good or bad idea?

I got a new Fridgidaire 50 bottle one about 18 months ago for about $400. So far it works fine. Only downsides: the racks could be more convenient, the temp is about 5deg off (so you have to put in a thermometer to get the temp you want), and it makes an annoying beep when the door is left open more than about 2 min.