It's a fun game! But then I may be a bit biased Value is really based on condition. In minty fresh condition expect to pay over 1200. Average, not too worn but playing right and all there figure 800-900

http://www.passionforpinball.com/science.htm

You shouldn't need to use powerballs to hit the ramps. On my game I can flip the ball completely around the Particle Separator ramp from either side!

6-6.5 degrees. It is not truly known to have weak flippers. Bally used the same flipper mechs for many years. What they ARE know for is wearing out rather quickly. Bally linear flippers use a longer than normal plunger (read: heavy) with a squared notch cut out to accept a nylon crank. The end of this plunger also slides in a split nylon "nyliner" grommet at the end of the bracket. This nyliner wears out or falls out allowing the plunger to drag. So along with Goonies excellent tip on the EOS the full rebuild is the single best thing you can do on Bally linear flippers.

You can also convert the linears to the old style link and pawl. I did try that and frankly on my own Strange Science it made the flippers too snappy and all my shots were now much harder to make. The ball tended to bounce back more and I got airballs I never seen before so keep that in mind if you decide to swap