I agree with HarryT & Shopaholic, better to buy something newer. Personally, I wouldn't have went any older than the Sony 350/650 due to the possible deterioration in battery life. Still, if you've bought it now, hopefully you will get some use out of it for a while even if the battery does need charged regularly.
In future, if you are in the UK and looking for a Sony, as well as ebay, it's worth keeping an eye on the
Sony Outlet store for refurbished bargains. They had a white T2 for £60 earlier today, though all gone now. Or try Morgan Computers (and search for Sony PRS) as they sometimes have Grade A/B refurbs, newest is currently a PRS 300 for £30 (with 3 month warranty).