Yes, you can subscribe to Creative Cloud Photography Plan which would cost $9.99 per month and it would include Photoshop and Lightroom.
Refer this link : Creative Cloud pricing and membership plans | Adobe Creative Cloud
There is still a perpetual license available. The us price for the upgrade is $79. This may vary depending where you live. Current version is LR 6.3
Oops.. Sorry.. I read it as "with the cloud" and shared the link for CC subscription accordingly.
Yes, you can go for Lightroom 6 standalone as suggested by ddeGannes.
Here is the link for Lightroom 6 : Products