There is a new compilation, just released, of Fairport Convention 1968-78. This contains 7 discs, a booklet and a poster in a boxed set.
This will take me time to work through, since there is a lot of material here (including BBC Broadcasts and live shows), quite a lot of which has been previously unreleased.
Worth a look, if Fairports are your bag. I got mine in Head Records (Leamington Spa) for £60. Not sure if better deals are available.