What the best second hand type for today

With the price of new combat jets reaching ever higher limits more countries are looking at second hand options for first and second line types. So what older types offer the best performance at the best price here is a list of aircraft to start

Mirage F-1 MF2000
Mirage 2000-5/9
Mig-29
F-16 Blk 25
SU-30
Kfir C10
Please use facts and figure and not statements like just because it is and fill free to add different types