So you want to buy a Stinson. Well the Stinson is a GREAT value aircraft.
Here is some general information about the Stinson 108. https://en.m.wikipedia.org/wiki/Stinson_108
Below are two videos that will help you learn a bit more about the Stinson 108. First video Covers a detailed video of a nicely restored Stinson 108.
The second video is a good walk around of the aircraft and covers some flying characteristics.