Hey young fella
![welcome %)%](http://www.aussiepinball.com.au/Smileys/classic/welcome.gif)
My advice depending on the era choose machines with good playfield's and backglass's . And as others have said make sure game plays 100% Also really give the game a good going over and look under the playfield and in headbox for wiring hacks and for other dodgy "repairs". Its a great hobby you will have lots of good times playing and restoring them..