Shure SM58S Classic Mic Pack with On-Off Switch
This is one of those items that is really a classic.  You can use it as a hammer to build a stage and plug it in and it just works. This is a great mic and does what it is supposed to do but it won't fix a bad singer. It will make you sound a little bit better.  This is well worth the money and will last for years.  I only had to replace my old sure mic because it grew legs and not because it broke.