You probably already know that. But recent sales data collated by Gamasutra shows just how badly the company needs your used games, with preowned sales accounting for nearly half of the company's profits.
See for yourself in the graph above, which shows that used product sales - which combines the sale of preowned games and consoles - make up 48% of the company's gross profit margin (which is "the gross profit divided by total revenue").
You all keep whining at the low trade-in value of your games at GameStop, and yet, you all keep trading your games in at GameStop...
There's more information (and more coloured graphs!) at the link below.
In Depth: The State Of GameStop, Part One [Gamasutra]