Unless a machine came out of a factory or is in pieces "as is" parts are not as often as issue as some would have you believe, in my experience. A machine that doesn't appear to have been used real hard usually hasn't been. Doing restorations to get a machine to like-new condition is another issue, but getting a machine operating adequately to work wood is usually not a money pit in my experience. Things like foot brakes are sometimes missing or broken and you can probably live without them.
In any case, a Northfield band saw is known to be a good one and the value will hold up if you need to get rid of it, believe me. I sold my Delta/Crescent 20" for $800 a couple of years ago without too much trouble and I'll bet the Northfield is much more refined machine.