By . Simon Jones . Real Sociedad want Arsenal to sell their £3.5million buy-back option on striker Carlos Vela. The club president Jokin Aperribay and vice president Angel Oyarzun flew to London at the weekend to secure the 50 per cent rights retained by Arsenal following Vela's sale last summer. Aperribay only has until July 1 to acquire the rights and Arsenal are looking for £6.5m plus bonuses, which could reach £8m for the 25-year-old. Buy-back: Real Sociedad want Arsenal to give up their 50 per cent stake in striker Carlos Vela (centre) Clause: Vela signed for Sociedad last summer but Arsenal can buy him back for £3.5million . Sociedad have already agreed a new four-year contract with Vela who is wanted by Atletico Madrid. Price: Arsenal want £6.5m plus add-ons from Sociedad for the Mexican striker (left)
Sociedad president Jokin Aperribay flew to London at the weekend . Arsenal still retain 50 per cent rights on Vela after sale last summer . Aperribay has until July 1 to acquire those rights from Arsenal . Arsenal want £6.5m plus bonuses for the 25-year-old Mexican .