GameStop has made a $55.5bn (£40.9bn) unsolicited offer to take over e-commerce firm eBay, the video game retail chain said on Sunday. The cash and stock offer values eBay at $125 a share, $20 more than the shares were valued at the close of New York trading on Friday, GameStop said in a statement . In a letter to eBay , GameStop's chief executive Ryan Cohen said he planned to make $2bn of cost savings at the firm within a year of the deal being completed. The BBC has contacted eBay for comment.