Good news is there is Solutions Pathways. This will give you credit for your old software towards the purchase of the new stuff. Credit where credit is deserved as the old saying goes 
If you’re a partner, head over to https://partner.microsoft.com/solutionspathway
If you’re a customer, head to the WESS site http://www.microsoft.com/wess/en/us/solutions-pathway-faq.aspx
