Rosco,
Everyone has made great suggestions and alternative suggestions to other software.
I am wondering if you are clear on what is available when you subscribe to the CC?
I have never been clear on how one can purchase an older used addition on EBAY and still have a license? Unless that individual decided never to update...since when you update you need you old license number. So I would be careful buying on EBAY unless it has never been used.
Photoshop CS 6 has a new RAW dialogue box with new features, and they are excellent - which you will not have with any version below it. So if you decide to buy a used copy I would go with that. The new features make converting a RAW file so much better.
As for the CC itself, the deals seem to change over time. However you can still get it for 9.99 a month now. This includes Lightroom 5.4 and of course it includes all the changes that have been added to programs since Adobe switched over to the Creative Cloud. There is a currency converter below the 9.99 so you can see the cost in your country.
Now you say you want to try it out. There was and maybe still is - you would have to check- a 30 day trial period. If you hated it..or decided against it you could op out. Maybe that still exists - not sure.
Chauncey is correct of course. I don't think anyone - even Adobe experts learn every single thing the Adobe programs can do. :) I personally would recommend getting the CC if you can afford it, and especially since it now includes Lightroom. And I believe the contact is for a limited period after which you can cancel it without penalty.
Good luck on making your decision.
My best,
Phyllis