I've had two 2.2 Breras and both have had the camchain changed before 50k, on my previous car it was supposedly done a short time before I bought the car (for around a grand by a main dealer) and needed doing again within a year (main dealer had gone out of business in the meantime), So it's a fair bet that the chain will either have been or will need to be changed at some time.
Prices vary. I paid around £700.00 at Autolusso a few years ago but that involved the camshaft variator being changed as well.
Don't forget the gearbox bearings problem. Again, budget for it if it hasn't already been done.
Don't let me put you off though, a well sorted example is a great car for the money...