Thank you for your thoughts Don! I am very attached to this idea so if you have any advice on the artwork or design that I already have laid out I would love to hear it! The point is for the items to represent the character's and their social classes. Thank you!
Well if you're absolutely wedded to the ideal until death do you part, try this then - make it more visually interesting.
When you look at a King in a standard pack of cards, you're drawn not just to the weapon he's holding but to the clothes he's wearing, the intricate and bizarre patterns, the way that after all these years you can no longer even distinguish the original shape of the garments once the two-headed design was introduced.
Your King is the weapon, so show us the weapon. Give us DETAIL - make it intricate, elaborate, ornate. Give a close-up of the handle, the guard, the blade's base, show us scrollwork, engravings, even nicks and scratches, perhaps the hand of the person wielding it and the reflection of his face in the steel. Make it beautiful and eye-catching - because if you don't, no one will be interested. And do take the effort to match the weapon/accessory to those on the original court cards in a standard deck.
The key to a fully-custom set of courts is that they have to be beautiful and artistic in some way, be it minimalist, baroque, cubist or what have you. If it isn't, there is no compelling reason to spend the extra cash to buy it when a pack of Bicycles from the corner store looks more visually interesting and costs much less. Make the kind of artwork that might hang in a gallery and you'll have takers in droves - it's got to be many levels above what you've shown us thus far to cross that threshold. I'll grant these are rough drawings, not your final products, but hopefully you get what I'm saying - in essence, "go big or go home," big being the measure of how attractive the artwork needs to be in the eyes of your consumers.
And get rid of those terrible blobs in the background. They look like the cartographer's been hitting the port too heavily.
Have fun with it, and I wish you luck.