What's your most prized item in your FM collection?

[Moz]

For those who collect Fleetwood Mac memorabilia, what's your most prized item in your collection?

Personally, aside from my small autograph collection, it would have to be my Oakland Day on the Green (1977) poster. I snagged it online a few years ago for about $50. Before I bought it, it was my most wanted FM collectible; now that title goes to a Rhiannon art print.