I had a leaking brake booster for a 97 GMC suburban, so to save money I checked with Yeartys to see if they had a used one. A new one was $230 and the used one was $79.50 with a $50 core charge. Seems odd there would be a core charge for a used part. I took it to my mechanic. He removed the old break booster and noticed the replacement from yertys was different. I need the vehicle the next day, so I did not have time for yeartys to find a new one and take it off. Gordon found one from advanced auto and they delivered it by 3:30 giving him time to finish that day. I returned the part to yeartys, explained the part was wrong, and I wondered what they could do for me. The man sitting in the middle At first he was talking normal, investigating vin numbers with chevrolet. The more he looked into it the louder he got and then the louder I got. He claimed there was only one break booster available for 95 through 99 suburbans, so the one he gave me had to be right. He said my suburban must have been modified with a different booster. I said could the suburban your part came off of have been modified. He said, the truck was a Penelec truck, and they would never change parts like that. I asked him if the one advance auto would be delivering would be the wrong part. He said it would. Then he asked me if I could read and held up the slip in front of me showing "No Cash Refunds." At this point I said OK then give me my core deposit back. He said, where is the core and I pushed the unit he sold me to him. He said, I will not accept that.
By the way, the part from advance auto was an exact match to the original in my suburban. Its amazing how they knew my vehicle was bastardized and was able to give me the right part - ha,ha.