How much is a 50 mint condition 1934 dollar worth?

I'm not sure what you mean by "50" - are you referring to a dollar or a half dollar? You can find a full set of price guides at a site such as http://www.numismedia.com/fmv/fmv.shtml

I also changed your question because you were in effect asking ME how much MY coin is worth, when you're really referring to one that you have.