TrueCar - Buying a car can be painful.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
CarCatch.uk - Find new and used cars for sale in the UK with CarCatch, an aggregator of all the top auto marketplaces
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Kelley Blue Book - New & Used Car Price Values
pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features