The price of a used engine in Australia depends on factors such as brand, model, mileage, and condition. Prices range from $1,500 for older Holden Ecotec engines to more than $20,000 for performance Nissan RB26DETT engines. Diesel engines tend to be more expensive because they last longer and are in demand by commercial buyers. Used engines can be purchased from auto wreckers, online stores, and specialist resellers, with some sellers offering warranties. To find the best price, compare prices, review engine history, and verify compatibility with your vehicle prior to buying.