Sorry, but a revolver which has had that "one perfect, pre-sale cleaning" is easy to spot.
Seeing a revolver which has had that one perfect pre-sale cleaning does not cause me to think "wow, an unfired revolver worth the price." Instead, it causes me to assume the seller is trying to cover something, even if it is just the firing of many, many thousands of rounds, rather than the usual gun show refrain of "this revolver has only had a couple of boxes of ammo fired through it."
In most cases, a revolver that has been cleaned in such manner is a "deal killer" for me.