Pinball Machines For Sale recommends the following sites for pinball and arcade game enthusiasts...
The Pinball Archive
The Internet Pinball Database
Pinball Repair Guides
Pinball at Wikipedia
Professional Amateur Pinball Association (PAPA)
World Pinball Player Rankings
See the Top 100 Pinball Machines and then come back here to Pinball- Machines-For-Sale.com to find your best deals.
Coinop.org
Arcade Games at Wikipedia
The Killer List of Video Games
Arcade Restoration Workshop
Coin-Op Game Database