Best double live vinyl?

plus one for Little Feat.

I also love the Who "Live at Leeds'. I recently picked up a remastered version done by Abby Road Studios. "My Generation, Magic Bus" side is very nice indeed.

Humble Pie - Rockin' the Fillmore

Rory Gallagher - Irish Tour 74

I’ll second @xcool with “Live Rust” - Neil & Crazy Horse

These may require 2 purchases to combine vol. 1 & 2 with some releases, but they are essentially live-double albums:

“In Person Friday and Saturday Nights at the Blackhawk” - Miles Davis Quintet

“Live at the Golden Circle Vol. 1 & 2” - Ornette Coleman Trio

A “Historic Concerts” release double-live LP featuring Max Roach and Cecil Taylor @ McMillin Theater, Columbia University 1979 is a stunning (if not particularly conventional) listen

Double Live Gonzo.

Frampton Comes Alive sold the most. 

If Little feat IS touring, it could never be the same without George, Barrere and Hayward.  Check Littlefeat.net for sure.  By the way, ALL my records from the sixties were ruined by my  Dad's record changer [Zenith].