Hello, I am interested in buying a truck, but I am a first-time buyer and don't know whether it's worth it or not. Listed below is the information about the truck.

Type: Semi-Sleeper Conventional
Class: Class 8 (33,001 lbs or more)
Make: Freightliner
Model: Century
Year: 2001
Mileage: 781229
Title: Clear
Condition: Used
Number of Axles: Tandem
Engine Make: Detroit
Engine Horsepower: 500
Fuel Type: Diesel
Transmission Type: Manual
Transmission Speeds: Super 10
Suspension Type: Air
Tire Size: 22.5

Based on this information about the truck, what do you think the truck's worth? In addition, I would like to know how much more fuel per mile a 500 horsepower engine will use compared to a 400 horsepower engine.
I really appreciate your help and would like to thank you in advance for your advice.

Well that same truck your talking about is currently 14,600.00 with 27 bids on ebay.

it looks to be a older Swift Truck though it has LTI on the top.. The discription states it has some damages.

I would approach with very high caution. I have driven a Truck that was suppected to been a former Swift Truck. Let's say I was in the Shop least 2 times a month. Once it was in the shop for 6 weeks. But that was THAT ONE TRUCK. The one your looking at very much could be in better shape.

I looking on ebay to see what they were going for, and found that one your discribing. So I do not know from own experence how much they are worth. Just comparing.

2000 Kenworth KW T2000 w/ 500HP Cummins with about 100,000 less miles and a 13 speed asking price $40,000.00 buy it now.

2000 2000 FREIGHTLINER CENTURY 500HP Cummins Buy it now 16,000.00. But I would be extra lery since they do not show you the Right side. They show a different Truck right side. One they are trying to sell was leased onto Bar-Nun the one they showed the right side of was leased onto Landstar.

As a Seller on ebay, becareful. Lot of scams going on there on ebay.