Played their albums recently
Unlikely to go for the 50th

Lots of demos, some I've heard
Below nicked from Amazon

Disc Two: Demos

1. “Our House” – Graham Nash *
2. “4 + 20” – Stephen Stills *
3. “Song With No Words (Tree With No Leaves)” – David Crosby & Graham Nash
4. “Birds” – Neil Young & Graham Nash *
5. “So Begins The Task/Hold On Tight” – Stephen Stills *
6. “Right Between The Eyes” – Graham Nash
7. “Almost Cut My Hair” – David Crosby *
8. “Teach Your Children” – Graham Nash & David Crosby
9. “How Have You Been” – Crosby, Stills & Nash
10. “Triad” – David Crosby
11. “Horses Through A Rainstorm” – Graham Nash
12. “Know You Got To Run” – Stephen Stills *
13. “Question Why” – Graham Nash *
14. “Laughing” – David Crosby *
15. “She Can’t Handle It” – Stephen Stills *
16. “Sleep Song” – Graham Nash
17. “Déjà Vu” – David Crosby & Graham Nash *
18. “Our House” – Graham Nash & Joni Mitchell *
Disc Three: Outtakes

1. “Everyday We Live” *
2. “The Lee Shore” – 1969 Vocal *
3. “I’ll Be There” *
4. “Bluebird Revisited” *
5. “Horses Through A Rainstorm”
6. “30 Dollar Fine” *
7. “Ivory Tower” *
8. “Same Old Song” *
9. “Hold On Tight/Change Partners” *
10. “Laughing” *
11. “Right On Rock ’n’ Roll” *
Disc Four: Alternates

1. “Carry On” – Early Alternate Mix *
2. “Teach Your Children” – Early Version *
3. “Almost Cut My Hair” – Early Version *
4. “Helpless” – Harmonica Version
5. “Woodstock” – Alternate Vocals *
6. “Déjà Vu” – Early Alternate Mix *
7. “Our House” – Early Version *
8. “4 + 20” – Alternate Take 2 *
9. “Know You Got To Run” *

I only wish I could justify the price to myself... or it were a bit nearer Christmas.

I think these things are best accessed through streaming as there's rarely enough of real value and interest to justify the price. Good to listen to once or twice, but shelling out for ownership is a different thing.