In a capitalist society a business has two choices:

1) Take all the money they can get.

2) Let someone else take all the money they can get.

Look at used game prices of desirable games like Tron, Indiana Jones, Twilight Zone, etc, they are quite high. That in turn has demonstrated to Stern that if a game is desirable, people are willing to pay high prices for it even if it's decades old. Given that, why wouldn't Stern go after that money and price their new games accordingly?