How to read a condition report (and what "good for age" actually means)

If a condition report says "stable, good for age, no intervention required," the piece is liquid — it will resell at-or-near comp. "Stable with prior intervention" means a conservator has already touched it; the work is fine, but auction-house attention falls 15–25%. "Unstable" or "requires intervention" means budget for restoration before any resale conversation.