Hi Christopher,
> How much does it cost to move a enterprise server to an amazon cloud service? ... Is there a price list somewhere?
This is an older document, but the whitepaper will give you some background and context,
Estimating the Cost of a GIS in the Amazon™ Cloud
And costs will vary depending on the complexity and size of your ArcGIS Server site/data sources. It might be best to contact your local Esri account manager/Distributor to have a more comprehensive discussion.
Hope this helps,
