: An official marketplace specifically for new and used engines. Budget & Local Options

: A direct supplier that stocks and ships its own inventory rather than acting as a middleman. Every engine is inspected and backed by a 6-month warranty.

: Provides run-tested and inspected engines packaged for nationwide shipping.

The best places to buy used engines vary by your technical skill level and budget, ranging from high-volume online retailers like UsedEngines4Cars and LKQ Corporation to local salvage yards. For the most reliable experience, direct suppliers that stock, inspect, and warrant their own inventory are generally preferred over private marketplaces.

: Good for finding deals, especially from well-reviewed professional sellers. Many listings include free shipping to business addresses.

: The largest used auto parts supplier in the U.S. with over 1,700 locations. They offer computerized inventory, detailed specifications, and typically include a warranty.