My best deal was Ciprian Marica on a free. He played 6 full seasons for me before he started to pass his peak, scoring 25 league goals at least each year & many more in the cups and Europe :thup:
However, my favourite signing would have to be Aquino. I thought it would take a few years for him to break into my first team (Blackburn by the way) but injuries forced me to play him in the first season. He held his own and then really established himself in the second season. Great up front or on the left wing