It could be an 'off the shelf', a mix or a sampler. Any various artist album you didn't compile yourself.

The mix's I've received from DiS swaps have been excellent, especially the one from jp100.
Out of loads of samplers I've managed to get, this must be one of the best:
Summer 2005
1) LOW- California
2) JOSH ROUSE- It's the nighttime
3) M.I.A.- Fire fire
4) J-LIVE- Audiovisual
5) ANDREW BIRD- A nervous tick motion of the head to the left
6) MICHAEL PENN- On automatic
7) LAURIE & JOHN- Ten years ago today
8) JESS KLEIN- Shootout at the candy store
9) TARANTULA- Atlantic
10) L.PIERRE- Jim Dodge dines at the penguin cafe
11) TARA ANGELL- Untrue
12) SKINNY PUPPY- I'mmortal
13) MASTODAN- Blood and thunder
14) ANIMAL COLLECTIVE- Leaf house
15) VASHTI BUNYAN- Diamond day

Now show me yours!