To perpetual CS6 Yes $200 Standard $400 extended. Newer versions require a Creative Cloud subscription Photoshop Extended + LR $10 per month for the foreseeable future.
Can I use the creative cloud versions offline? , I'm don't always have a web connection when working.
Yes Applications are installed and run on you computer. You only need to connect to activate and deactivate your softwares also every one in a while to need to connect to keep your activation active and also install updates.