Wrong price tag. Yes they do.
I went into the old Boston GC, Looking up on the wall, and see a 1957-AV-Reissue P-Bass for $379.00. ( Brand new ) The list was $999.00 at the time.
Quickly I ask a sales person to bring it down. ( It was on the top rung.) After a look-see, I run to the register and buy it.
Person at the register then says this is a $999.00 bass not $379.00. I politely say, That it is GC policy that they must honor anything that is marked on the floor.
They try to talk me out of it, I ask for the store manager, who comes out looks at the tag. Tells them I'm right, I get bass for $379.00. And then fires the sales-person on the spot who mark the bass.
True story.
Ouch......I wouldn't feel too good about that one.....regardless of the deal on the bass.