EDB Postgres Advanced Server is open source, so I don't pay for licensing.

I have been working on the community edition. 

I believe this is a negotiation issue with any organization that is based on the size of footprint looked at. Hence our experience would not be applicable. But negotiate, negotiate, and negotiate.

The price difference compared to more expensive solutions like Oracle is significant. It is a solid, less expensive choice.

The cost of the product is not really a question because the open-source product itself is free. The only cost in addition that we pay more for is the support payment because we have the enterprise usage and that is all.