From now through July 24, 2015, qualifying purchases can get you a rebate of up to $1500.*
As of February 1, 2016, all new perpetual licenses will be discontinued. New seats of Autodesk products will be Desktop Subscription only.
You can continue to get your current software as a perpetual seat as long as you remain current on Maintenance Subscription.
*See here for more information: http://www.autodesk.com/campaigns/global-promotion-tcs