Entry Level Road Bike?

I am looking at trying to get an entry level road bike that I can grow into the sport with. I am trying to find a bike around the $500 range that I am not going to have to replace in the near future. Additionally, I live near lots of hills and been told to look for a bike with Shimano shifters. Does anyone have... show more I am looking at trying to get an entry level road bike that I can grow into the sport with. I am trying to find a bike around the $500 range that I am not going to have to replace in the near future. Additionally, I live near lots of hills and been told to look for a bike with Shimano shifters. Does anyone have any suggestions for a good bike?
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