Most expensive chelsea soldbr br Eden Hazard is the most expensive player Chelsea has ever sold. The Blues sold Eden Hazard at a fantastic price of 115 million euros.br br The most expensive player Chelsea has ever sold.br br 1. Eden Hazard, Real Madrid (€ 115.00)br 2. Kai Havertz, Arsenal (€ 75.00)br 3. Mason Mount, Manchester united (€ 64.20)br 4. Diego Costa, Atletico Madrid (€ 60.00)br 5. Oscar, Shanghai Sipg (€ 60.00)br br Thanks.