Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets) Pick polygram.ink (preferred broker) |
13% | 87% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
13% | 87% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Market context
GameStop has submitted a non-binding, unsolicited proposal to acquire eBay for approximately $55.5 billion, offering $125 per share in a 50% cash and 50% stock mix, with CEO Ryan Cohen prepared to bypass eBay’s board and appeal directly to shareholders if the offer is rejected[1][2]. The bid, backed by a $20 billion debt financing commitment from TD Bank, represents a 46% premium to eBay’s unaffected price on 4 February 2026 and aims to transform GameStop into a major e-commerce rival to Amazon[2][5].
Historically, unsolicited bids of this scale—such as Microsoft’s $68.7 billion takeover of Skype in 2011, which eBay had previously acquired—often face prolonged regulatory scrutiny and board resistance, yet still trigger significant market repricing even without immediate closure[9]. The current 13% crowd-implied probability for a “Yes” resolution by December 2026 reflects the non-binding nature of the offer and the substantial hurdles in financing, regulatory approval, and shareholder consensus, diverging from more optimistic sportsbook lines that sometimes overstate deal certainty in speculative M&A contracts[6].
Traders should monitor eBay’s board response, any definitive agreement announcements, and regulatory filings with the SEC, as the market resolves solely on an official announcement of acquisition or merger, regardless of completion timing[4][5]. Recent reporting confirms eBay’s board is reviewing the proposal while advising shareholders to take no immediate action, making the next 12–18 months critical for determining whether the deal advances to a binding stage[4].
Methodology
We track Will GameStop acquire eBay? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
FAQ
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- Do I need to KYC for this market?
- On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
- How reliable are the quoted odds?
- The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.
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