Go to your local second hand CD store, (pawn shops aren't too bad either) and buy 150 CD's which match your formatt. Make sure they are in good shape!! There is also a possibility of a trade out here with the store if you have time to put something like that together.
Now have the sales staff go and trade out oil changes and movie passes for consilation prizes to be used. Also, you can use t-shirts, and stuff in the prize vault and a couple of gag gifts for consolation prizes too. Your call! All together you're going to need 149 consolation prizes and one big sum of money for the grand prize.
Make certificates to place in the CD's listing what they won. (Only one with the money amount) Then decorate a huge box and fill it with the CD's, each stuffed and taped shut! Put the box in the lobby of you building, or even in the studio, space permitting.
Here's where you're on you own! Find a creative way to give away chances to grab a CD out of the Cash Stash. Everyone wins, and someone will walk away with the cash. One thousand bucks works good, less seems cheep, more can be used for another promotion. This is simple and easy and budget kind.
One problem we ran into on this is that if qualifiers can come in as soon as they win and someone wins the cash in the beginning your promotion just ended very, very quickly and you have to fork out more cash to help get rid of the rest of the CD's. On our second try at this we set a day in which people could begin to come and draw out of the box and then it took a couple days for someone to eventually come and draw it out.
The whole reason for keeping the box in the studio or building is to keep un wanted hands out of the box. Plus, people get a chance to see the studio! Sure they see you on location, but who wants to look at you anyway! The technology in our studio seemed to over whelm most visitiors and make them forget the money for a split second. Also they get the special "behind the Scenes" look at the radio station. Not something just anyone usually gets. If you keep it in the building the same effect still happens. Just leaving out the technology part. They still get to come to the radio station. Something you just don't do on a regular basis. What I'm talking about here is PR!!!!
Once you have the winner, (make them open the CD in front of you of course) rush them in to a studio and get a reaction for a promo! We went so far as to have each person open theirs in the studio in front of the guest mic and we rolled tape on it to get the initial scream of excitement which made for a great promo!
This promotion has endless possibilities and is alot of fun for everyone!

