The following lists some of the things I am trying to track down. If you have anything listed here, and are interesting in selling them, please e-mail. Thanks!
Atari Coin-op "Canyon Bomber" from 1977. Would love to get hold of this arcade game. Also Drop Zone 4 from Meadows from 1975.
Commodore 64/128 music software: Playalong Albums - Beatles and Pop Hits on cassette, diskette or ideally an emulator file.
Commodore Pet game: "Air Attack" by Supersoft (1979). Game cassette with or without overlay.
BBC Micro games on Disk, Cassette or Emulator file:
1. Arcade Adventures (Brilliant Computing 1988)
2. Break-time Games (Brilliant Computing)
3. Derek Harrison's Compact (BIMH) programs.
4. Micrex Toy Interface.
5. Nidd Slo-Mo for BBC.