GameStop CEO Ryan Cohen's unprecedented $56 ‌billion takeover bid for the much larger eBay drew skepticism from investors and analysts Monday, with shares in the online retailer trading much below the offer price.

The nearly $12 billion video-game retailer, popular among meme-stock traders, is attempting a half-cash, half-stock buyout of a company nearly four times its market value with just around $9 billion in cash and a debt load of $4.2 billion.

GameStop disclosed over the weekend it has already built a 5% stake in eBay ‌and touted $20 billion in potential debt financing from TD Securities to convince shareholders of the deal.

Cohen argued he could replicate ​his cost-cutting playbook at GameStop to boost eBay's profitability, while tapping GameStop's around 1,600 U.S. stores into a physical network to make eBay a better competitor to Amazon.

Still, eBay shares rose just 7.5% to $112 in premarket trading, well ⁠short of the $125-per-share offer - a sign that investors were doubtful the deal would close. GameStop fell 6%.

EBay said it was reviewing ​the offer, including GameStop's ability to deliver a "binding, actionable proposal."

"We have the ability to issue stock in order to get the deal done," ⁠Cohen told CNBC in an interview.

Morgan Stanley analysts said the market needs more funding details and that an all-stock alternative could be a hard sell to investors given that the two companies have "fundamentally different" business models and few revenue or cost savings from combining.

Both eBay and GameStop sell collectibles such as trading cards but their mainstay ‌businesses are different. While eBay earns fees by connecting buyers and sellers online without holding inventory, GameStop is a traditional retailer ​that buys goods wholesale ‌and resells them through physical stores.

"The other primary option (to fund the deal) would be a leveraged buyout. Assuming at least a 20% premium, that would make this the largest leveraged buyout ever, surpassing ‌the recently announced $55 billion Electronic Arts transaction," Morgan Stanley analysts said.

Only a few deals in which a smaller company has bought a much larger one have succeeded. Paramount Skydance agreed earlier this year to buy larger rival Warner Bros Discovery, but the deal was bankrolled ⁠by Larry Ellison, one of the world's richest people with ‌a net worth above $200 billion.

EBAY IN M&A SPOTLIGHT

Once a competitor to Amazon, eBay has repositioned itself in recent years as a destination for antiques, rare sneakers and high-end fashion rather than mainstream e-commerce.

That has ⁠helped power ⁠sales growth and boosted its stock price, with shares up nearly 20% so far this year following a strong earnings report last week.

Analysts said even if the GameStop bid failed, it ‌could draw interest from other potential acquirers.

Once likened to Warren Buffett by "The Big Short" investor Michael Burry, Cohen was a central figure in the 2021 meme-stock frenzy.

Buying eBay could help him make progress on the targets key to his compensation package worth roughly $35 billion that GameStop unveiled in January, including ‌growing its market value to $100 ​billion.

"Ryan's attempt to take over eBay ‌cannot possess the actual honest and true intent to compete with Amazon. Rather clearly, the intention must be to dominate collectibles and used goods of all ages," Burry, a GameStop investor, said in a Substack post.

"If GameStop wants to do ​it with billions of interest expense and all manner of covenants restricting its movements, it will not be breaking new ground," he said, noting that he may sell some or all of his shares by the end of the week.