95 Lesabre power window problems

I am looking at buying a 1995 Lesabre. This is my 1st experience with a Buick. Very nice car, only 41K miles. The power windows in the back seat do not work. I would be interested in finding out if anyone else has had this problem, & would possibly know the cause.

Do they not work from the rear doors themselves, or not so from the driver's switch as well? One thing overlooked is the cut-off switch on the driver armrest. Once you have that checked, the next place to go is the master switch on the driver door, as all the window circuits run through it.