If he doesn't come back, which is likely to happen, and you want to get
some satisfaction, you can sue him in small claims court. Of course
that will take time, but may make you feel good. There are two
problems:

! - Proving your case

I assume you don't have anything in writing, which is a lessoned
learned. If you live in a state that allows recording of phone
conversations with only one party's consent, you could try to get him
on the phone and record him discussing the deal. You say look, I
paid you x, you agreed to do y, you didn't show up, etc. If he
doesn't deny it, you have pretty good proof. You could also carry a
pocket recorder, again if your state laws allow this. Sometimes jerks
like this will leave a mesg on your answering machine that is good
evidence of what they did. Be sure to save it if he does.

2 - Collecting a judgement

Most of these skunks are judgement proof, so unless you know he has a
real job or assets, collecting will likely be impossible.