The experience varies significantly depending on the platform: Piano Buyer: Piano Buying Guide

Buying a used piano online is a high-reward strategy for finding premium instruments at a fraction of their original price, often saving 50% or more compared to new models. However, it is an "as-is" market where the biggest risks are unseen mechanical issues like cracked soundboards or worn-out actions. To succeed, you must shift your focus from simply browsing listings to vetting the seller’s credibility and hiring professional eyes for inspection.