What to do about getting a ferret?

I'm a college student that lives in an apartment that allows caged animals (I asked specifically about ferrets, they said fine, it is also legal in my state to have them). I've been doing nothing but research on them since I saw a couple in the pet store 2 weeks ago. That doesn't sound like a lot of time I know, so I'm waiting for a couple more weeks or even longer to truly decide. I'm a very responsible person and have lived with animals my whole life, and I just miss having them around so much it almost hurts. I'm aware that they are expensive, I can afford it. I know they need lots of time for their whole lives and not just when they're growing up, I'm willing to spend the time with them everyday. I know everything that I need to get for them, and I know that they require patience and training (at least if you get a kit). My question however, is that if I were to decide to buy one, pretty much my only option is to get one at a pet store, and I've heard nothing but bad things because 99% of those ferrets come from Marshall Farms, at least that's what I've heard online. I want to know if these ferrets are still healthy overall (if the pet stores took proper care of them) and if they are happy like ferrets people get from quality breeders that actually care for their kits. Also, my decision may be slightly rushed because the pet store near me is getting some kits in on friday, and before they are neglected (if they are) I could buy one and spend time with it properly. Should I wait longer or get one when they come in? (kind of two questions, just answer both if you can thank you very much ^.^)