At that price and for what it is - a 9A SB with the long bed and chucks with 'few extras' its gonna have to be pretty beat not to be worth it ...
That little SB -the 9" in the A model is possibly the most well known of all the lathes out there, and is possibly one (if not the-) most sought after of lathes for the HSM'er - and - with good reason! Its small enough to allow fitting in many situations, yet robust enough to tackle most anything you can fit in it, -- has a huge following which translates into any bit of info you can dream up to ask about, somebody will know the answer -- parts availiability is large with MANY aftermarket vendors suppling more and more new parts -- it really doesnt have much of a downside.
So, if this one is in any kind of decent condition - jump on it!!
If everything seems to be going well, you have obviously overlooked something........