GameStop's (NYSE: GME) quarterly report is due Thursday, with results heavily dependent on its resale and used game business. According to The Wall Street Journal, GameStop will buyback used games from customers for about $14.99, whereas most other companies will buyback for less than $5. This leaves GameStop with a 70% profit margin, leaving some analysts to believe this is what's keeping the game retailer from becoming another Blockbuster or Radioshack. Depending on the upcoming report and profits based on resale, the shares could move up or down significantly, according to The Wall Street Journal. In November of last year, when the previous earnings were reported, the stock dropped 14% in just one day. For more business and financial news, click here.