Hi, Newbie here so on a learning curve. I am contemplating buying my wife a Gazelle electric bike with the Bosch motor in the bottom bracket location. She is a very nervous cyclist who suffers from asthma, would this be a good purchase for her? The bike is 2 years old and has only done 490 miles and the owner has kept the battery charged up. I am looking to get the bike for half of it original purchase price.