There are board and ingot summoning ones but don't get too excited - they only 'summon' 10 boards or ingots and they have like a 5 min timer. Once their charges are out you have to recharge with an item that takes like 4 skills to craft. Totally not worth it.
Just an FYI....
Ah, yes... you mean to recharge them you need to make "runed switches" I believe their called. I'm working on getting to the point of being able to make those.
And don't forget, once and a while there are talismans without charges, thus being infinite uses. ^.^
And again... if anyone can verify the sheering of the sheep thing for certain, that would be cool.
Oh, and good luck on the auction. hehe. =-)