Third party authenticators for Ebay sellers/buyers

I just had a very positive experience as a buyer! I purchased a Chanel flap bag for $3000+ based on a credible listing (seller had 100% positive feedback, and described the condition as "near perfect inside and out." After the bag was sent for authentication, eBay informed me that, while the bag was confirmed to be authentic, their inspection revealed that it had been PAINTED in spots and the paint was chipping off. They also sent me photos to show this damage, which was NOT pictured or mentioned in the listing. They gave me the option to cancel the transaction and receive an immediate refund. The bag is going directly back to the seller from the authenticator. Their intervention saved me from a major hassle.