Like any used car. Take it out for a really long test drive on smooth and bumpy roads. Then take it to a good inde or dealer who has the computer system to read ALL the codes.
Have them check the suspension thoroughly. 94 and 95 Wagons must replace entire front A arm, bushings in it not replaceable! Lots of control arms in rear suspension. Clunk when changing gears is usually diff bushings.
Make sure Climate Control Heat & AC ok. I know how cold it gets in Ft. Riley Manhattan [courtesy US Army 1968].
Actuator's attached cable has same dreaded wire insulation as harness.
Trans Control Pressure Cable another expensive "wear" item on 124.

What else can you buy for $4 and have all these wonderful people help you fix???