Petar Zanev from Litex? Really cheap! I used him in my west brom save for at least 3 seasons, and then got a replacement.
Jorge Fucile about 3mil?
Marcos Rojo from Spartak Moscow. Good young prospective left back who can also play centre back. Just checked him out on Genie scout and on my game he has a PA of 166 (I apologize if no one wanted to see that, I don't know how to insert spoilers) And his projected attributes are really good: Heading - 17, Marking - 17, Tackling - 17, Crossing - 15, Anticipation - 17, Bravery - 16, Positioning - 16, Strength - 16 & the rest of his Physical stats are 14. So would be a pretty good investment to be fair.