Two things that immediately spring to mind are:
1. If she has to travel to the shop would she have to do the same if there was a problem so would she not search for a shop nearer to home
2. She should do her homework and search as many reviews as possible before being possibly talked into something that she is not familiar with. She could always give one of the recommended shops a call before her trip and then check it out at home, at her leisure, before travelling.