Ads with "Checkup"

I would use it as a way of reassuring a potential buyer that the amp was up to spec and had been checked out by the manufacturer.

Kind of like having a mechanic check out a used car. To make sure there aren't any trouble spots lurking below the surface. Such as a transmission about to blow.

So much can go wrong--some pieces I've had have been trouble free for years.---Some not so---. I figgure it had a problem and was cared for.--EVERYTIME I see this 'checkup' thing;I assume it went in for any other reason than just a checkup.But, hey I'm a suspicious kinda guy.---Oh, the guys that didn't send their piece in for a 'checkup'---They end up in the "disputes" colum.--'ya think?

In many cases,it's an item that is still under factory warranty to the original owner,but the warranty doesn't
transfer to the second owner.