Bring a Trailer, Cars & Bids and Rad For Sale are just a few of the many niche car enthusiast focused auction sites that have gained huge popularity over the last few years, prompting praise and criticism from all over the car world. The upsides to these marketplaces are obvious: easy access to great cars, curated listings, and quick responses from sellers. But what are the downsides? Why are people apprehensive about these auction sites, and are they right to be?