I thought that much. The first link saw a $129- price for a brand new 15.4" replacement screen for that model. Buying another used laptop just to use the screen is not the ideal since that could go fast from age and use with no return for exchange or refund.
If the 9100 there is in reasonably good condition then the $129- is a little over but not too bad a price to see a new screen. You may find it for less elsewhere if not from another laptop. But expect to pay high on replacement parts since laptops are typically "you pay for the convenience and portability".