If you can afford it, I'd go with the 3200ps with extra inks and media. You could save a ton of money with the inks. Media is good, but not if it's what you don't use or need.
It will be a much newer machine, presumably, but it could have the belt problem too. If you're thinking about it, you could call and ask if it is in service, is running, etc. If not in service, how long sitting, etc.
As far as the machine discussed above...Having known it had 240sqft is not much use? I figured it tells me that its had a low run, no?
This machine too has full inks.
Yes, low run. What size ink carts though? Setup carts are much less than 130ml full size carts. Big difference. 69ml
If you figure that just one cart is 130ml and the machine has run only 550 ml, it's not even broken in, really.
Have you run it? How much are they asking?