what about the buying of second hand fighters?

I wrote in order to comment and hearing your opinion about the tendency developing in our countries, at least in mine, of
refurbishing old fighters often second hand ones instead of buying new hardware. I think examples are paramount, here in
Spain we have second hand Mirage F-1 from France and Qatar and
second hand F-18 from the US Navy and Marines. Now Italy is
considering even second hand Mig-29. My opinion on the subject is that the money should be employed in accelerating the Eurofighter program and that the second hand buying is simply
a simptom of bad political management.