The former Real Madrid trainee is the joint highest Spanish scorer in La Liga.
Considered one of the best talents in the Real Castilla before his 2009 exit, he went on to play 32 games for the Championship side and score seven goals.
But while his return may not have been prolific, most Derby fans could see he had talent. However, at just 21-years-old, perhaps he was still too young for a move abroad.
He went back to Spain that summer and ended up joining Rayo Vallecano in 2013.
He has been in incredible form for the Madrid-based club this season. After scoring four goals in 15 minutes against Levante back in February he has not stopped his great form.
He currently sits on 16 goals from 34 games, although he has not scored in his last six appearances.
Despite this he is the joint-highest Spanish goalscorer in the division with Aduriz of Bilbao and is out of contract in the summer.
So who should make a move for the player?
Surely Everton should be keen.
The Toffees are not exactly overwhelmed with striking options at the moment. Romelu Lukaku leads the line, with Arouna Kone not exactly providing expert support from the bench.
Since letting Samuel Eto'o go to Sampdoria they have been bereft of options. Kevin Mirallas and Steven Naismith can fill in at the position - but another forward would certainly be necessary this summer.
Bueno would be a fantastic and cost-effective option who would also fit in brilliantly with Roberto Martinez's style of play.
Everton would do well to bring in Bueno this summer.