HELP PLEASE:

I'm doing a writing contest (Spread Your Wings and Fly), but I want to make sure I have awesome prizes so that I can get quality fics as well as many participants. (This is in no way to be little any of the participants I have so far because I'm super grateful to them and I haven't even read any of them yet.) This is a common thought to all who make contests, so I'm asking you all for your advice.

What would be a fair prize to give for one-shots and for chaptered? I want to do 1st, 2nd, and 3rd place for each.

Also, what are some trust worthy sites that I could buy kpop items from? Because I'm considering on buying items in hopes to get a good turn out and to buy some things for myself haha.

If someone could please help me out with this, it would sure help a ton! Thanks! <3