If you do buy a scanner, check it will work with your operating system.
A case in point. I bought yesterday a used Plustek 7200i, and this came with the bundled software, Silverfast 6.5.
All went well until i tried to load the software onto my Mac, running Mavericks. No go.
The 7200i doesn't seem to run with OSX, so I am either going to have to get a Windoze machine (never), or sell the Plustek ( most likely).
Gary