I would also think the "check-up" was a sales tactic but not necessarily a bad one. It's much better that the seller went through the trouble of having a problem taken care of before selling the unit & letting potential buyers know this than just selling as is. It may have been something as minor as a binding post hanging up. Also, the "servicing" might have been an upgrade.
If there's any question as to what exactly transpired during the "check up", all one has to do is contact the factory with a SN to get info. I've done this & even have received reassurance from the factory that the seller was a great customer of theirs!
If there's any question as to what exactly transpired during the "check up", all one has to do is contact the factory with a SN to get info. I've done this & even have received reassurance from the factory that the seller was a great customer of theirs!