I've got a couple of these, as I end up using these things every so often, providing support for family, relatives and friends, and even in my consulting work. But it's $20 delivered. If I got one now I'd pay more and get USB 3.0 on it.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182221
I've use drive docking stations frequently when a desktop or laptop has a virus of some kind. I can remove it, put it in the dock, then use my PC's anti-virus to clean it as an external HDD. It's a lot faster than trying to clean an infected system.
The only bad thing about your 2.5" enclosure is that, as the other poster said, it is limited to 2.5" HDDs. It's meant more for making a permanent external HDD, like you'd buy at Costco or Walmart, not for the type of temporary use you were talking about, where the HDD eventually either gets thrown away (damaged) or put back in a laptop.