The odds of getting a perfect camera are really high.
But it will be 100% ifo you do the logical thing, take your best FX wider lens to the store and try it before handing over your money. If there left focus is off, it is really off. Use a wide angle prime if possible, say a 24 1.4 wide open and try it in the store.
There are a lot of reasons to deal with your local pro shop instead of out of state mass marketers. It is good to have local expertise available to help if you need questions answered or something checked out, which on-line stores can't and wouldn't do. Stan St Petersburg Russia