Pre-recorded Reel to Reel Albums - In Germany. Good selection, not cheap but recommended.
Forums are the best places to get advice and learn about reel to reels.
HiFi Engine - Manuals and Photos of vintage equipment
The Tape Project - $500! albums recorded at 15 IPS (Most domestic machines will not play these)
Digital Deck Covers - protect your device
This is a brilliant resource of old HiFi brochures - I could (and did) spend hours here
Reel to Reel Recording Museum - You can buy & download a 7hr! long documentary here.