Just was browsing through the maintenance that was done for my car before I purchased it. They charged 52.50 to change the air filters. Wow. Lmao. They also listed 149 for detailing though they admitted it hadn't been detailed. These were costs associated on their end, so I used them against them.
On the certified pre-owned check it passed the cigarette smell check but was definitely smoked in daily.
They also missed the leaking head gaskets. Thanks to Corner 3 garage for finding that one.
I'd just stay away from dealers unless you can get something replaced under warranty.