Yeah, this machine would take a WHILE to get running again. I am not afraid of surface rust as well BUT we are talking about years of it, not a month outside waiting to be auctioned off.
You may also have to replace a lot of electrical - i.e. in the sun a lot of cables over the years do not have insulation working.
Also price is a bit high, 1300? You could get far more "working condition" machines in ON on auction for a 1000.