I have an assortment of Multitracks. I spent $50 on one and all it needed was a $10 cantilever brake stud repair kit. Another cost me $150 and was in nearly perfect condition, needed nothing more than some minor adjustments. A third, also $50, needed a complete overhaul - I replaced just about everything except the frame, fork, and wheels (mostly). I rebuilt it as a drop bar gravel bike and put $200-250 into it. So as others have said, there's no one answer on this.