From Chris Kenner's "Out Of Control". 3,2,One is an easy and very clean 3-coin production and vanish. I like that the effect is uncluttered and direct. No over-proving or hand-washing to muddy it up. 3 coins appear and vanish one-by-one.
If you can find it, 'Out of Control' is definitely worth whatever you have to pay for it. It's filled with excellent coin magic.