Well, for sure go new, as the cost of replacing an electric appliance every 8-10 years will be returned to you due to the resistance that an old electric motor sucks up.
I purchased a Best Frost 3 years ago, and it works like a champ. I ordered it on line and saved a bundle, and this is the company that makes blood coolers for hospitals, so it needs to run, and never fail.
Here's the link: http://www.summitappliance.com/refrigeration