Online marketplace eBay has rejected an offer from GameStop to buy the company for $55.5 billion, dealing a blow to the video game retailer’s ambitions to create a rival to Amazon.

Ebay, whose market capitalization is four times that of Gamestop, highlighted the “uncertainty” around the “financing proposal” for the $56 billion unsolicited bid.

EBay on Tuesday rejected an ambitious $56 billion takeover bid from the much smaller GameStop on doubts over the financing of the deal.