Depends on your organization, the licensing model you pick, etc. They generally license per core now, and you have to run at least 4 cores. Without giving too

Depends on your organization, the licensing model you pick, etc. They generally license per core now, and you have to run at least 4 cores. Without giving too much away I'd say the cost of licensing a 4-core box running Enterprise is on the order of $20K, which you pay one time, up front. Then you just pay for your support contract. You can also do stuff like license an entire VMware farm or failover cluster, and then you can overprovision services for extra cost savings.