Tell me if I missed any players. They have to match the requirements above, and NOT be home-grown.
But the list is quite interesting if you think about it. Ronaldinho actually beat the Brazilian Ronaldo in terms of value-per-goal (for transfer fee), even though they both spent 5 years at their clubs. ;)
PS. I only used striker who had spent 2.5+ season with their teams. Just to be fair. That means that players like Falcao and Ibrahimovic are ineligible for this list.
Roberto Soldado (Valencia) - 10.000.000 Euros, 81 goals
Alvaro Negredo (Sevilla) - 15.000.000, 85 goals
Carlos Tevez (City) - 55.746.747, 73 goals
Cristiano Ronaldo (Real Madrid) - 94.000.000, 202 goals
David Villa (Barcelona) - 40.000.000, 48 goals
David Villa (Valencia) - 12.000.000, 128 goals
Karim Benzema (Real Madrid) - 35.000.000, 89 goals
Gonzalo Higuain (Real Madrid) - 12.000.000, 122 goals
Fernando Torres (Chelsea) - 59.305.050, 35 goals
Fernando Torres (Liverpool) - 23.722.020, 81 goals
Robin van Persie (Arsenal) - 3.261.777, 132 goals
Gareth Bale (Spurs) - 8.302.707, 55 goals
Edinson Cavani (Napoli) - 17.000.000, 104 goals
Luis Suarez - 26.500.000, 51 goals
Wayne Rooney (United) - 30.364.185, 197 goals
Didier Drogba (Chelsea) - 28.466.424, 157 goals
Frank Lampard (Chelsea) - 13.047.111, 205 goals
Samuel Eto'o (Barcelona) - 24.000.000, 129 goals
Ronaldo (Real Madrid) - 46.000.000, 104 goals
Andriy Shevchenko (AC Milan) - 18.966.700, 173 goals
Ronaldinho (Barcelona) - 30.000.000, 94 golazos ;)
Euros per goal (Years player spent at club)