Center Display not working

I have a 2004 Prius and in 2007 my center display ceased to work. I had my local Toyota dealership replace it for around $500 (ouch). Well low and behold it is shot again. There is a picture display but the touch buttons do not work. I called Toyota again to see if the price has come down. Guess what? I was told it would cost me nearly $4,800. WHAT? Apparently in 2007 when my display was replaced it was replaced with a refurbished one and mine was sent to a company who refurbishes these units. I was told this process no longer exits and I would have to purchase a new unit from Toyota. I haven't done it. I am using the controls on the steering wheel. Has the display ever gone on anyone else? How did you resolve this? Thanks