The other day, after posting the top 100 dividend stocks from the S&P500, I was asked why RadioShack had not made the cut. The answer did turn out to be because the stock is not part of the index. That being said, after a quick look, I could see why I was being asked about it. A stock that pays out a dividend of 12% with a fairly known brand? Seems like a great buy right? Or is it one of those deals that sounds fishy from the very start? Today I thought I would do further analysis using the top 20 things I look at when judging dividend stocks but also trying to determine if it would be a sustainable dividend portfolio or could maybe fit a higher dividend portfolio.