[bernardlunn]

You can offer:

A. Limited to say 5 years. The world will have changed by then.

B. $200k License Fee with 20% Annual Maintenance. Then in a burst of generosity you can waive the License Fee but keep to the Annual Mtce. This is pretty standard, sounds a bit sneaky but focusses customer attention on value.

[DenisM]

Have you actually done B? It does sound sneaky, as you said, so makes me worried.