well, I think it's really up to you- are you interested simply because it's discounted, or have you genuinely been wanting a Bal and this came along? The retail of this new is $1835, so yes, it's a "good" deal in that sense; but if you're kind of 'meh' with beige bags or prefer a larger size, then maybe it's not so good a deal. (BTW I'm totally guilty of doing this- I see something that is worth a lot marked down & I buy it, fully knowing it's not right for me, but unable to resist!)
If you are interested, I'd check to make sure it's not damaged & that it's authentic, though.