Ripped off?

So I bought this G4 Powerbook from one of my friends yesterday. He said since it was his dad's, he couldn't log onto the admin name, but the computer restarted to a guest account. He gave me a discount, at $150.00. So naturally I took it home and fixed it to my own settings, and made an admin account. I want to sell it now, but I'm not sure what it's worth. Here are the specs:

Machine: PowerBook G4 15"
CPU: PowerPC G4 (1.1)
CPU Speed: 1.33 GHz
L2 Cache: 512 KB
Memory: 512 MB
Bus Speed: 167 MHz
Boot ROM Version: 4.8.4f1

I have the power cords, etc. It's a little dented at some points, but still looks damn good. It uses Mac OS X. Oh, and it has 57.3 GB left, after I deleted everything that was unnecessary. Can someone give me an idea how much it's worth?

I'd buy that for a dollar!

Seriously, one dollar, that's what I would buy it for.

I'll give ya 5 times as much as >>2 and >>3 are offering.

I offer 43.21.

http://www.mac2sell.net/

How the fuck can you go and sell something that was a gift?  The deep discount wasn't for you to profit, they gave it to you because you're a friend and they probably figured you needed a computer!

Fuck!  You make me rage harder than the homeless who beg because they're hungry, but then you see them buy cigarettes with their goddamn change.  You are what's wrong with the world.

MACBOOK = 0 DOLLARS.