Linda looked at our 100-year-old upright and told us straight whether it was worth adjusting and tuning. It turned out for a modest amount, she could make it sound better, and she did. Beyond that, she said, the amount you invest in this piano will not be worth it; you'd be better buying a good, used piano. As we didn't have the budget to do that, we elected to have done what could be done, and it was worth it.
A previous technician, 20 years ago, said for $6,000 he could do wonders for it: new this, new that, adjust everything. But really, no 100-year-old piano is worth that kind of investment, and Linda would never suggest that kind of work for an old piano.
She's a straight shooter.