Tough choice. If you trust this person and are allowed to check for dead pixels at least then it might be OK. Still, the monitor may have defects that only show up after an hour or so of use. Risky.
I think I'd rather pay $425 (including shipping) and get a new Samsung 245BW with warranty from newegg.http://www.newegg.com/Product/Product.aspx?Item=N82E16824001234