We really don’t know enough about the seller to rule out the possibility of filing a small claims suit against him in California. But the seller would need to be served in California.You're kidding, right? Whether it's worth the hassle and cost of suing in Kansas (or trying to enforce a CA judgment in Kansas) for $888 is something you'll have to decide for yourself.
A California superior court would have personal jurisdiction over the seller, but the OP would have to sue in "regular" court since California small claims courts lack jurisdiction over non-residents, except in a couple circumstances not applicable here. Cal. Civ. Proc. Code section 116.340(e)-(g).