Wow what a massive piece
But yeah for the price side of it I don't know anything about the value of what you have, but what I can say is that years ago I walked into a Blockbuster shop ( man I miss Blockbuster
), and asked if I could possibly buy some of the huge cardboard Playstation and movie displays. They told me for years they used to just bin them in the skip after the promotion, and then they started only selling them through a contract to a company for an extremely cheap price, so they were viewed as almost worthless.
These displays though may possibly be worth a lot one day when it becomes a 'vintage' piece many years later &/or it becomes collectable and there's a market for it.
It would be an extremely niche market for something this size too, and would require a 'certain' kind of collector.