If i were you id just wait. I sold my fifa 12 and all my ultimate team stuff the other week. I figured i may as well get some money back whilst its still worth something. Luckily all my UT team stuff more than covers the purchase of fifa 13.
I would just wait for fifa 13 its only just over 1 month away, and if you pre-order from Amazon you will get free gold packs for Ultimate team if you order the "ultimate edition"
Its a nice game to play with when you are bored but man, the online on the game is very competitive, and not only that but they only go for the big teams
No, I wouldnt. If you get it 2nd hand you cant play online without paying extra for a pass, and a brand new copy still costs £30+ which is the same price as what Fifa 13 will be when it comes out. So I'd just wait.