compaq 500$
LG 1000$
Sony 1000$
Wouldnt go as far as 1000$. The link above for Sony one is way better everything and is 1000$ new.
Even the 500$ Compaq has all better specs,
But since it has the SONY name,
right now id say 500-800MAX about right for your laptop.
laptop costs have really come down in the last 2 years.