Very nice KK, you are looking at about 2k+ at least, more from GB and also more rare to pop up in GB and aquabid. It's possible to get that colored so called "king kamfa" ish looking kamfas, but everything perfect including the fins, body structure and most importantly big kok like that(which is THE definition of KK) will not come by often.
Ken AKA Cheken have a very nice KK he bought for $2500 that looks similar in quality.
If you are looking to fork that much money into getting one, I would contact Naminator,flowerhornsfrombeyond, or Danz. They have a source that can spot you one as long as $$ isn't an issue.
Good luck to your search Matt,
JP