While you can still buy Photoshop CS6, Photoshop CC will not continue running once the subscription runs out.
CS6 is still available as a perpetual license. You may have to dig around a bit on the Adobe web site to find it, but it's there somewhere. It doesn't have all the bells and whistles (and updates) of the CC version, but it's still perfectly serviceable if what you want is to pay once and have software that you can continue to use without paying a monthly fee.
So in truth, I have to buy an older version of the software to maintain a perpetual license. Further, if I want the latest version of PS, I must subscribe to the monthly or annual contract and continue to pay to allow the software to work, In research, I find CS6 available on other sites which is listed as the "older version".
To revise my question, is the latest version of PS available with a perpetual license?
No. You must subscribe to the Creative Cloud in order to get the Photoshop with the latest features.
When considering this, imagine that the term "Perpetual" is a bit of a misnomer. How long will you really be able to use it?
While I can still run my copy of Photoshop 6.0 on Windows 8.1, it's possible because I'm a computer geek. Many folks can't get the older versions to install properly. And it's even worse on Macintosh system. I don't think anyone can run anything older than what, CS3 or CS4? on a modern Mac.
Focus on this: If you've been buying the upgrades each new release for $199 (about every 18 months), something like the Photographer's bundle at a hair under $10 a month is actually a better deal. You get more software (including Lightroom) and more capable software (Photoshop Extended used to actually be $399 to upgrade).