looking for halloween costume...

I am still looking for a costume for our CFC-FFL halloween party this November 1. I was thinking of just wearing all black during the party, but I decided lately to buy a real costume for the party,hehehe. I saw a store near my work place that sells halloween costumes and I came there this afternoon, but it was close coz they always having closing time in the afternoon from 2-5pm. So I'll come back there tomorrow before the closing time and I just hope it's not so expensive coz I don't have a lot of budget for it. And I just hope I'll win the "best in costume" award coz the prize is 50 euro, so it will cover up the expenses in buying the costume. That is if I'll get the award,hehehe.