Just for kicks, here are some suggestions of what you could buy with your $5 once you win! All taken from the internet ask / answer type sites.
"Toilet paper."
"CHOCOLATE"
"A piece of paper and an envelope. Nothing beats a hand written letter." <-- Now this one would be cool, imagine writing a letter to the guy you beat that says "Sorry bro I'm da best lolllll"
"Awesome random things at garage sales."
"tampons, pads, panty liners, make up, pens, pencils, erasors, YO PLAIT YO GURT, nail polish, carton of milk, cheese, TOYS, music from itunes, 5 things from the dollor menue from mcdonalds, a thong, note books," <-- this girl's got it all figured out!
"Subway lunch deal"
"McDonalds!"
"A couple of packets of vegetable seeds. If you plant them, they will more than pay for themselves."
"Coffee & a lottery ticket"
"Energy Drink And Sour Candy"
"Ice cream :)"
"A good espresso"
"Two cups of coffee and a walk in the park with someone you love."
"Reece's Peanutbutter Cups."
"bubble tea! You got to drink and eat the bubbles!"
"Four items at the Dollar Tree. They even sell food now. You can buy packets of salmon for $1."
"A real cheap bag of weed lol"
"Diabetes from McDonalds...."