I am about to buy my 60D on line but I'm nervous about spending so much money and having to wait for my gear

It took me ages to save it and I would hate for something to go wrong.
What if it turns up broken?
Are there any hidden costs?
Are the cameras exactly the same if they come from OS?

How do you know if the company is reputable or not?
Can I name the conpany I'm buying from on AP and get others opinions?

I'm so nervous and very, very excited! Any advice will be greatly appreciated!

Teressa