Features:

• Allows visitors to look through your auto listings 24 hours a day, 7 days a week, 365.25 days a year.
• Easily keep your auto listings updated -- no HTML coding required to add, delete, or modify listings.
• Built-in image manager -- upload photos via your web browser, either when creating new listings or modifying an existing one. If photos are not uploaded for a vehicle, a "photo not available" image will be automatically displayed for the listing.
• MySQL database backend -- free and fast, mySQL is standard with most hosting plans.
• Secure -- no one but you can change your listings.
• Virtual Marketing -- visitors can email listings to their friends right from Sunshine & Companie's AutoClassifieds.
• Showcase specific vehicles -- built-in featured listing manager allows you to place special offerings right on your front page.
• Flexible search -- browse vehicles according to whatever criteria you like.
• While the program is free, a donation to the author is recommended.

Of course, Sunshine & Companie's AutoClassifieds is written entirely in PHP, which makes it easy to customize and revise to match the look of your website.