Wilson Isidor

According to available data, the player's market value is listed at €18.00m as of mid-2026. This follows a period of high valuation by his club, with reports of a £35 million (approx. €41 million) price tag in September 2025, which was lowered to a reported £25 million (approx. €30 million) in January 2026. During that January window, Beşiktaş was reportedly prepared to offer €15 million. The player's last completed transfer was from Zenit St. Petersburg to Sunderland in February 2025 for a reported fee of €6.0 million.

Our valuation is driven by the significant drop from Sunderland's reported asking price of approximately €30 million in January 2026 to the current reality of interest from Championship clubs. While Sunderland will seek a profit on their €6.0 million investment in Wilson Isidor, a reported €15 million offer from Beşiktaş in January and the player's subsequently reduced role suggest a value closer to that lower figure. The current Transfermarkt value of €18 million appears to be a realistic ceiling.