Contest idea

I'm not sure if this will come across as cheap way for me to get cover art, but here it goes:

I am looking to replace all my book covers with something more eye catching. I propose a contest. You all send me your cover concepts (should be around 1500x2400 pixels) and I will choose a winner for each book. Each winner will receive a free copy of ALL my current books as well as my upcoming The Sorcerer's Abyss. (Possibly in advance of Amazon release. Almost definitely)

NOTE: I have to actually get images I like. I cannot guarantee a winner if there are only a few entries and none are suitable. If I have a hard time choosing, I will post the covers on my Facebook page and let the people vote on them. I think this could be fun! Is this reasonable, or am I out of my mind? Oh! You also get cover credit!

Let's start today and end the contest on Halloween!