Vector Newbie - Buying advice?

Hi. Over the last few years I've seen and collected a lot of raster
arcade kit and I kind a' know what I'm doing with that stuff (although
I'm no tech) but next week I'm going to have a look at some cabinets and
perhaps add the first vector game to my family, perhaps an asteroids
cocktail. So does anyone want to offer any advice to a vector newbie on
what to look out for in a b+w atari vector game? Any tell tale signs of
future trouble that I should check for when test running the machines?
Any wisdom you guys would like to share?
Thanks.

-- 
James G Watt
http://www.kinetic-arts.demon.co.uk
Part of the Video Arcade Game Collectors WebRing.
You are in a maze of twisty little passages, all alike.
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