Yeah not bad at all and rather cheap!
If you wanted to be able to expand this PC though later on, your limiting yourself with the motherboard and CPU, since you'd have to change both these parts to make it better, though you might not even be bothered in doing that since it should last you a good while anyway.
The Geforce 5200 is also okay for the average gamer but dont expect it to fly at new games with high settings or anything
You could easily change this though with the onboard AGP slot
You'd need a monitor yep, thats all