How much would researchers pay for scholarly database access?

In the July 26th Chronicle of Higher Education, the ProfHacker column asks independent researchers how much they would pay for access to scholarly databases (off-campus K-Staters, try this link). That made us wonder, too. What dollar value do researchers place on access to databases? Researchers associated with an institution like K-State have access to thousands of articles, ebooks, streaming audio and video, and other resources (including the campus-wide subscription to the online Chronicle).  And, because K-State is a public and land grant institution, anyone who walks into Hale Library can access the vast majority of those databases and resources. AND, through the State Library of Kansas and a statewide consortium, anyone in the state of Kansas can currently access this set of databases.

But what if you didn't have this access (or maybe you don't)? How much would you, or could you, pay to access a database in order to continue your current research? How many databases do you consult when you conduct your research? Would you pay the same for each of them?