Chris, you basically buy one product from the bundle for $1 and upgrade to the full thing for $75. Plus it is the latest version with extra instruments and presets and VST, AU etc.
I'd hate to look back how much I paid over the years in upgrades and such to the bundle I own, AIEP2?
Anyhow, got this from Waves so if you are in the market there
Starting tomorrow, Nov 24, share our Black Friday Sale with your friends – and get 12.5% of their next order in credit towards any software purchase at Waves.
http://refer.waves.com/9aVL
Stephen