Suggestion need for the price of HP laptop

Hello

My Friend is selling HP Laptop.I Need To Buy It But I Am Confuse what Price I Should Buy It.
It Is Used But Not Used More Than 1 Month.

Description-
System Manufacturer- HP
System Mode- HP G62 Notebook PC
Processor- AMD Athlon(tm) II P320 Dual Core Processor, 2100 Mhz,2 Core(s),2 Logical
RAM- 3GB
HDD- 100GB



Can Any One Help Me.

You would need the full model number for specific info

My Friend Has Put New HDD ,The Old One Was Corrupted Of HP That Why................

That explains it, it did seem an odd size

I doubt replacing the hard drive will go that far but he should have used the warranty and had them replace it.
no I may be wrong if they invoke clause g HP Warranty - Warranty information