It's okay I guess, if I were you I would do some changes to these because all of the colors work out great but remove the Js and the circles and mabye provide it with some cool pattern and you can have like your signature on the box instead of on the cards would be abit more unique I would pay max 2.99$ for these not more.
But keep working on the design and put your signature on the box instead would be much better in my opinion =)
Thanks
Take care brother - Markus/JokerZingo