Possible troll alert... user with less than 20 posts, giving up on Pentax.
I swear these hissy fits are generated on a computer somewhere in Nikon headquarters.
"The Sigma/Tamron 150-600 is the only lens for me."
Sigma doesn't even pay Pentax licensing fees. They reverse engineer and their products don't function 100% like Pentax product.
The Sigma 150-600 isn't as good as the Pentax 150-450 with a TC. Not even close, so you're in love with a product that isn't even the best solution, you're complaining about not being able to buy a cheap knock off.
So you essentially want Pentax to provide you with a body so you can use cheap glass. I'm pretty sure that's not in their business plan.
I have several Sigma lenses, and they are just not as functional as Pentax lenses.
My take is, if the lens love of your life is a Sigma, buy what ever body goes with it. Clearly none of your Pentax lenses are the "lens love of your life" so you probably shouldn't have been with Pentax in the first place. As my photography teacher used to say, find the lens you love and buy the body that goes with it. I just find it hard to believe the lens love of your life is some third party un-licensed knock off that is clearly inferior to the Pentax option in every regard, except price.
I guess we are supposed to apologize that Pentax doesn't make cheap.
So your choice says a lot about you. You're not a fan of any Pentax lens apparently, and you probably shouldn't own one. It was an ill advised choice to begin with. Good luck with your D7200.
Quote: I have been a loyal Pentax owner user for over 45 years, with the FF almost available in the UK.
There will be lot's of buyers for your old K-moount glass. You can sell all that stuff you don't want to buy your beloved 150-600. There are lots of folks out there who will appreciate it.