Does anyone know, for sure, what Gibson charges their dealers for their guitars?

My guess is that they charge the dealers around 1/2 of list price.
Then the dealers advertise list price with a 1/3 off.
Then if they have a couple that are not moving, they sell them at cost, which is 1/2 off list.

Can anyone verify this?

It would be nice to know, when negotiating with the Gibson dealers, what their cost is.

Thanks