Are most of the parts stock? Or has he used all the good parts to put on another bike?
I know the STP 3 comes with the lowest spec but if it's got V Brakes it's either very old or was potentially purchased relatively cheap as a parts donor for another bike!!!
And to whoever said the frame was lower quality...not true, the frames are the same throughout the STP range apart from coming in two different sizes.
Just do your research and make sure he hasn't transferred the ****ty parts from a cheap XC hardtail onto that, then you're pretty much just buying it for frame value (STP frames I think are somewhere around $150 -$250Au 2nd hand, the latter being for spanking new ones)
Hey I have a giant stp the same exact bike u are looking for. it is in great condition and would be a great buy. i want 350.00 but I will let it go for 275.00 bc i need the money to buy my sons first car. but on the other topic this is a great bike to have. it has only been riding a couple times and it is in great condition. If you have any questions you can call me at 443-768-1010 or 410-338-0276. my name is annie. thank you