You're in luck. Cali is a great state to buy a Niro in as there's a very large stock. You can use Peak Kia (CO) for pricing against CA dealers. They have hail damaged EX Premium packages for 25800 pre-tax and 26500 pre-tax fixed. I used that pricing, albeit without saying the status of the cars, to get the price I got (sub-27k pre-tax).
Kia of Irvine quoted me at 27090 + fees + taxes when I gave them the chance to give me their best offer and then to beat the one I had. Rally Kia was 29800 + fees + taxes, but will match a "reasonable" written offer.
Make sure to inform any dealer you call that you're getting offers from across the country. You don't care about distance, you want best offer. Don't set foot in a showroom until you have a written offer, unless you need to test drive a Niro. Make sure that if a dealer won't give you an offer unless you come in that you tell them you won't buy from them. Your entire negotiating power comes from calling/emailing. They have the upper hand when you show up without a written offer from them.