here are the prices you can win. Some of them are not sounding good but are very useful.
1. A kiss from Hayley's charries ( all three be the ultimate guy! )
2. eye color change ( like purple or pink! you can only have colors like these when you win something not as normal charrie )
3. a new wand ( a new wand makes you owner of two wands! )
4. a thread with whoever you want. you decide other has no choice.
5. house changing. ( usually we don't do this but as a price its good )
6. no classes for a day. ( free time is good time )
7. password to other house common room.
8. graphic made by your favorite artist.
9. magical fireworks.
10. a date with your fav lady. or guy.