Ask HN: what to do with a colocation contract?

I have an extra server that I cannot justify colocation for anymore (everything it runs can fit on a slicehost $20/month).

I have about $600 in payments left in the colocation contract and they want half that to cancel early.

Are there any good ideas for softening this cost (I don't need to "make money" just not spend so much)? It would have to be some arrangement that was very low maintenance for me.

Some kind of "sublet"?

Thanks