Could you possibly make payment guaranteed as I have an amazing idea and cannot wait for you to see it, also what size and format do you want the finished file in, do you want it in PSD or a simple PNG? Finally, do you have any preferred colours that you would like me and the other designers to use?
--Thanks in advance :)

I recommend a .PSD format so that you can edit my sent work to your exact specifications but so far I think I've followed all your specifications

I will only be able to make the payment guaranteed once I've seen 1 design that I really like. Also, the files should be submitted as AI

Fair enough.