* Engine type: The F-250 in 2004 offered several engine options (e.g., 5.4L V8, 6.0L V8, 7.3L Power Stroke diesel). Diesel engines are generally much more expensive than gasoline engines.
* Mileage: Lower mileage engines command higher prices.
* Condition: A rebuilt engine will be cheaper than a used engine in good condition, and a "long block" (engine without accessories) will be cheaper than a complete engine.
* Source: Buying from a salvage yard will be considerably cheaper than a dealership or a reputable engine rebuilder. Online marketplaces will fall somewhere in between.
* Location: Prices can vary regionally.
Therefore, I cannot give you a specific price. To get an accurate price, you'll need to:
1. Identify the exact engine: Check your vehicle's documentation or the engine bay for the engine code.
2. Check online marketplaces: Search on eBay, Craigslist, and other used parts sites, specifying the year, make, model, and engine type.
3. Contact salvage yards and engine rebuilders: Get quotes from several local businesses.
Expect to pay anywhere from a few hundred dollars for a very used, potentially problematic engine from a salvage yard, to several thousand dollars for a low-mileage, rebuilt engine from a reputable source. A new, factory engine would be far more expensive still.