SQL Server was $50k per socket (going to core) for the Enterprise Edition as a list price. The typical SQL Server sale was >$100k, easily. Also, sales were negotiated and Microsoft licensing is totally fluid, especially if an Enterprise Agreement comes into the mix (where the cost is spread out over a few years). People citing MS licenses here are blind to how the majority of MS license in Enterprises get sold--huge deals with multi-year subscriptions that cost lots of money. MS will typically "true up" licenses at the end of an EA.