Fiesta ST - what to look out for

[acme]

I'm looking at getting a Fiesta ST, I've read all the buyers guides, understand the spec etc, but can't see a great deal as to what to look out for, other than the usual second hand car stuff.

Given budget it'll probably be one of the earlier 2014 models I'll go for, ST-2 or ST-3, whichever the best comes up. Can any owners/previous owners advise what to look out for?

Cheers in advance.